What size/width slot is required for pushing the plastic edge into?

Not sure what width you are asking about. If you are talking about the channel it goes into it is pretty much standard size which is a groove you press the flange into. The only width/gap you need to make sure of is the door to the frame which is about 5/8. Close your door and measure the spacing. I used this to replace the original of 37 years old and it fit like a charm. Very satisfied, looks good and will stop any air leaks. Hope this helps.

The groove you press the flange into should be installed first, because regular doors do not have it, right?

Actually our door had a groove and we just replaced the old stripping that the cats had shredded. Easy and worked great

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20 Feet Rubber Weather Stripping Door Seal Strip, Self-Adhesive Backing D-Shape Door Weatherstripping for Door Frame Insulation Large Gap, Easy Cut to Size(Black)

Product ID: 596358632

Details

Brand
Fingwerk
Colour
Black
Item thickness
0.23 Inches
Material
Rubber
Product dimensions
6.1L x 0.01W

📏20 feet length for full coverage

❄️Flexible rubber resists extreme temps

🛠️Self-adhesive backing for easy install

R997

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚪 Seal the deal, block the chill, and upgrade your comfort game!

STICK STAY POWER - 3M-grade self-adhesive backing ensures a rock-solid hold that won’t peel off
CUT TO FIT NO FUSS - Easily trim with scissors or a utility knife for a custom, seamless seal
WEATHERPROOF YOUR SPACE - Flexible rubber won’t crack or freeze, keeping your home cozy year-round
SEAL EVERY GAP LIKE A PRO - 20 feet of premium D-shape rubber fits gaps from 2.5 to 5.5 mm perfectly
VERSATILE INSULATION SOLUTION - Ideal for doors, windows, cabinets, and even speakers—upgrade your entire space

The Fingwerk 20 Feet Rubber Weather Stripping Door Seal Strip features a durable D-shape rubber design with a 3M self-adhesive backing for effortless installation. Measuring 20 feet long, 9mm wide, and 6mm thick, it fits gaps between 2.5 to 5.5 mm, providing effective insulation against drafts, dust, noise, and temperature extremes. Its flexible material resists cracking and freezing, making it a reliable, versatile solution for doors, windows, and more.

Specifications

ASIN	B0BLTNL21B
ASIN	B0BLTNL21B
Brand Name	Fingwerk
Color	Black
Customer Reviews	4.1 4.1 out of 5 stars (171)
Customer reviews	4.1 4.1 out of 5 stars (171)
Date First Available	14 December 2022
Included Components	3M adhesive tape
Item Dimensions L x W	6.1L x 0.01W Meters
Item Thickness	0.23 Inches
Item Type Name	Rubber Weather Stripping
Item model number	FD20
Manufacturer	Fingwerk
Manufacturer	Fingwerk
Material Type	Rubber
Model Number	FD20
Number of Items	1
Product Dimensions	4.83 x 20.32 x 20.32 cm; 180 g
Recommended Uses For Product	Door, Electrical cabinets, Window
Unit Count	1.0 Count

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