---
product_id: 256244369
title: "7-String Skinny Top Heavy Bottom Slinky Cobalt Electric Guitar Strings, 10-62 Gauge (P02730)"
brand: "ernie ball"
price: "R373"
currency: ZAR
in_stock: true
reviews_count: 5
category: "Ernie Ball"
url: https://www.desertcart.co.za/products/256244369-7-string-skinny-top-heavy-bottom-slinky-cobalt-electric-guitar
store_origin: ZA
region: South Africa
---

# Cobalt alloy for max output 10-62 gauge for tonal balance 7-string extended range 7-String Skinny Top Heavy Bottom Slinky Cobalt Electric Guitar Strings, 10-62 Gauge (P02730)

**Brand:** ernie ball
**Price:** R373
**Availability:** ✅ In Stock

## Summary

> 🎸 Elevate your sound with the power of Cobalt – feel every note, own every stage!

## Quick Answers

- **What is this?** 7-String Skinny Top Heavy Bottom Slinky Cobalt Electric Guitar Strings, 10-62 Gauge (P02730) by ernie ball
- **How much does it cost?** R373 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/256244369-7-string-skinny-top-heavy-bottom-slinky-cobalt-electric-guitar)

## Best For

- ernie ball enthusiasts

## Why This Product

- Trusted ernie ball brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smooth Playability:** Engineered for clarity and reduced string noise, perfect for studio and stage.
- • **Extended Sonic Palette:** 7-string design delivers deep lows and sparkling highs.
- • **Made in the USA Quality:** Crafted with premium materials for durability and consistent performance.
- • **Precision Gauge Balance:** Skinny top and heavy bottom strings optimize playability and punch.
- • **Unmatched Magnetic Power:** Cobalt alloy boosts pickup response for richer tone.

## Overview

Ernie Ball’s 7-string Skinny Top Heavy Bottom Slinky Cobalt strings (10-62 gauge) feature a revolutionary cobalt alloy that enhances magnetic pickup interaction, delivering an extended dynamic range with crisp highs and strong lows. Designed for professional guitarists seeking clarity, durability, and a balanced tonal spectrum, these USA-made strings offer smooth playability and reduced noise, making them a top choice for modern electric guitarists.

## Description

Engineered to maximize output and clarity, Ernie Ball Cobalt Slinky 7-string guitar string sets are one of the latest innovations in string technology. Seeking to provide guitarists and bassists with a current voice, Cobalt strings provide an extended dynamic range, incredible harmonic response, increased low end, and crisp, clear highs. Cobalt provides a stronger magnetic relationship between pickups and strings than any other alloy previously available.

Review: All comparisons/descriptions are in the context of my guitar (alder body, maple/pau ferro neck with SS frets, hard-tail bridge). I've been using Stringjoy strings for a while now (freaking fantastic by the way, as customizable as you could want gauge-wise) which are very full and lively (lots of harmonics, plenty of mids and they feel amazing for strings made of standard materials). The Cobalts, by direct comparison, have a lot less mids, around the same amount of low end and a bit more presence on top. They jangle very well and would be great for a guitar/pickups that are a little clogged up in the midrange. The set I normally use has gauges very close to this set of cobalts, but the cobalts feel a bit more loose than I would have expected (a few reviews I read stated that, when questioned, the folks at EB said that they're made with a slightly smaller core wire and that's fairly easy to see when inspecting the ball end during installation). They feel a bit rougher than what I'm used to, but they aren't uncomfortable by any means. I feel the greatest strength of this material is just how controlled/quiet they sound. Not just because of the slight scoop in the mids, but I don't hear the strings ring between the nut and tuners at all. Compared to standard slinkys and paradigms the cobalts are far and away my favorite. I'll be switching back to my Stringjoys in 10-14 days, but these are great strings that I could see many applications for.
Review: Très bon jeu de cordes. La marque Erie Ball à déjà fait ses preuves et est adoptée par grand nombre de guitaristes renommés. Pour ma part, elles offrent un bon confort de jeu et tiennent plutôt bien dans le temps. Le petit plus, c'est le côté "lubrifié". Autant dire qu'avec ça, on glisse facilement sur son manche. Je recommande ces cordes. La qualité est au rendez-vous.

## Features

- Cobalt produces a stronger magnetic relationship between pickups and strings than any other alloy previously available.
- Cobalt 7-string electric guitar strings provide an extended dynamic range, incredible harmonic response, strong low end, and crisp, clear highs.
- Wound strings consist of Ernie Ball’s Cobalt alloy wrapped around a tin-plated high-carbon steel core wire.
- Engineered to maximize output and clarity.
- Made in the USA.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B009XNP2NA |
| Body Material | Cobalt |
| Color Name | Skinny Top Heavy Bottom (10-62) |
| Country Produced In | USA |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,790) |
| Date First Available | 14 November 2012 |
| Item Styling | Skinny |
| Item Weight | 45.4 g |
| Item model number | P02730 |
| Material Type | Steel |
| Number of Strings | 7 |
| Product Dimensions | 10.8 x 1.27 x 13.97 cm; 45.36 g |
| Size | Skinny Top - Heavy Bottom |
| String Gauge | 10-62 |
| String Material | Kobalt |

## Product Details

- **Brand:** Ernie Ball
- **Colour:** Skinny Top Heavy Bottom (10-62)
- **Instrument:** Electric Guitar
- **String gauge:** 10-62
- **String material type:** Kobalt

## Images

![7-String Skinny Top Heavy Bottom Slinky Cobalt Electric Guitar Strings, 10-62 Gauge (P02730) - Image 1](https://m.media-amazon.com/images/I/815VVdeXe8L.jpg)

## Questions & Answers

**Q: Can these strings handle drop G?**
A: I haven't tried drop g, but I Play in drop G# no problem. I have a 26.5 scale length, so if you have a 27' it would definitely work. Probably not with a 25.5' though

**Q: would these things handle adgcfad tuning? I'm new to guitars and I wanna jam to some Korn**
A: These can take ADGCFAD perfectly fine the strings themselves are good for 25.5 inch scale length but even better on a guitar with 26.5 inch scale regardless they have clarity bite and good feel and I highly recommend them for all styles of music.

**Q: I need serious advice. Could I use the lower half of these on my 6 string, just to play music for one band? (Deftones)**
A: Yes, you can and I have as long as your bridge will fit the strings through it.  You will definitely need to adjust the setup though and the longer the scale length the better.

**Q: What is the gauge of the 3rd string supposed to be? My set came with 2 13's**
A: Gauges for the Ernie Ball 2730 set are: 10-13-17-30-42-52-62.  Thanks!

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by P***K on 3 July 2018*

All comparisons/descriptions are in the context of my guitar (alder body, maple/pau ferro neck with SS frets, hard-tail bridge). I've been using Stringjoy strings for a while now (freaking fantastic by the way, as customizable as you could want gauge-wise) which are very full and lively (lots of harmonics, plenty of mids and they feel amazing for strings made of standard materials). The Cobalts, by direct comparison, have a lot less mids, around the same amount of low end and a bit more presence on top. They jangle very well and would be great for a guitar/pickups that are a little clogged up in the midrange. The set I normally use has gauges very close to this set of cobalts, but the cobalts feel a bit more loose than I would have expected (a few reviews I read stated that, when questioned, the folks at EB said that they're made with a slightly smaller core wire and that's fairly easy to see when inspecting the ball end during installation). They feel a bit rougher than what I'm used to, but they aren't uncomfortable by any means. I feel the greatest strength of this material is just how controlled/quiet they sound. Not just because of the slight scoop in the mids, but I don't hear the strings ring between the nut and tuners at all. Compared to standard slinkys and paradigms the cobalts are far and away my favorite. I'll be switching back to my Stringjoys in 10-14 days, but these are great strings that I could see many applications for.

### ⭐⭐⭐⭐⭐ Review
*by I***T on 10 December 2018*

Très bon jeu de cordes. La marque Erie Ball à déjà fait ses preuves et est adoptée par grand nombre de guitaristes renommés. Pour ma part, elles offrent un bon confort de jeu et tiennent plutôt bien dans le temps. Le petit plus, c'est le côté "lubrifié". Autant dire qu'avec ça, on glisse facilement sur son manche. Je recommande ces cordes. La qualité est au rendez-vous.

### ⭐⭐⭐⭐⭐ Review
*by I***E on 23 November 2022*

se sei un old school che usa ancora la sette corde come me e non è passato alla otto corde come i nuovi tamarri della chitarra fermati e leggi qui. Ero un po' scettico per questo prodotto cobalt, sia per il prezzo sia per le recensioni mirabolanti. pero provandole e registrando il suono è realmente piu cristallino, ottime per il suono djent di Meshuggah e simili, molto dleng dleng. Mi sembrano anche piu resistenti. Prodotto promosso

## Frequently Bought Together

- Ernie Ball 7-String Skinny Top Heavy Bottom Slinky Cobalt Electric Guitar Strings, 10-62 Gauge (P02730)
- Ernie Ball Skinny Top Heavy Bottom Slinky Cobalt Electric Guitar Strings, 10-52 Gauge (P02715)
- Ernie Ball Skinny Top Heavy Bottom Slinky Nickel Wound Electric Guitar Strings 3-pack, 10-52 Gauge (P03215)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.za/products/256244369-7-string-skinny-top-heavy-bottom-slinky-cobalt-electric-guitar](https://www.desertcart.co.za/products/256244369-7-string-skinny-top-heavy-bottom-slinky-cobalt-electric-guitar)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-11*