What is the net weight of the solder?

1 POUND, THE SPOOL WEIGHT IS NEGLIGIBLE.

Is this the same solder as the olden days "Kester tv-radio solder"? If not, which one is?

Hello, and thank you for your question on Kester wire solder. This solder uses the Kester "44" Flux which has virtually dominated the field of activated rosin core solders for well over four decades, and has not changed. This solder is highly used for reliable production line soldering, as well as general purpose soldering for electronics. If you have any other questions, please never hesitate to reach out to Kimco Distribution for answers.

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Kester 24-6040-0039 Rosin Cored Wire Solder Roll, 44 Activated, 0.040" Diameter

Kester 24-6040-0039 Rosin Cored Wire Solder Roll, 44 Activated, 0.040" Diameter

Product ID: 9425919

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⚡3.3% flux content for instant wetting

🔩60/40 SnPb alloy for reliable joints

🧵0.040" (1.00mm) medium diameter wire

Description

⚙️ Solder smarter, not harder — join the pros who trust Kester!

ACTIVATED ROSIN FLUX - Kester 44 flux ensures fast, reliable wetting every time
LEGACY OF EXCELLENCE - Dominating activated rosin core solder for 40+ years
PRECISION MEDIUM DIAMETER - Ideal 0.040" wire for versatile soldering tasks
TRUSTED ALLOY COMPOSITION - 60% tin and 40% lead for strong, durable connections
PRODUCTION LINE EFFICIENCY - High mobility flux promotes instant-action soldering

Kester 24-6040-0039 is a 1-pound spool of 0.040" diameter rosin core solder wire with a 60/40 tin-lead alloy and 3.3% activated rosin flux (44 series). Renowned for its instant wetting and fast-spreading flux, it delivers reliable, high-quality solder joints ideal for medium to large wires and components, making it a staple in professional and production environments.

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