FREE SHIPPING One of our most popular solders Kester "44" Rosin Activated Flux is excellent for instant wetting action. A reliable solder formula for production line soldering. RA flux core solder is the industry standard for electrical and electronic hand soldering. Compatible metals: platinum， gold， copper， tin， solder， silver， nickel， cadmium， brass， lead， bronze， rhodium， beryllium copper， palladium， immersion tin and immersion silver. Kester 60-40 #44 Product Performance P/N 24-6040-0061 Excellent for instant wetting action Residue is non-corrosive and non-conductive under normal conditions High activity RA core flux provides excellent wetting action even on nickel surfaces Residues are non-corrosive if not cleaned Industry standard for electrical and electronic hand soldering Excellent solderability to a wide variety of metallizations Concorde-Electronics is an authorized Kester Solder distributor. Kester 24-6040-0061 Specifications: Alloy: Sn60 / Pb40 ( 60% tin - 40% ) Wire Diameter: .062" 1.50mm (16 gauge) Flux: #44 RA Rosin-Activated Core: regular core size 3.3% by weight ( #66 ) Melting Range: 361-374 F， 183-190 C Spool size: 1 lb. RoHS Compliant: No Classified as ROM1 per J-STD-006C MEETS FED SPEC QQ-S-571e， ANSI-J-STD-006C， AND FEDERAL MILITARY SPEC.， MIL-F-14567， TYPE RMA Applications Production line soldering Single-sided board soldering Solder dipping applications ***FREE SHIPPING***