Kester 24-6337-0027 Solder Roll, Core Size 66, 63/37 Alloy, 0.031" Diameter

Rosin" 44" is a high activity RA core flux designed for excellent instant wetting action, even on nickel surfaces. Although" 44" is a ra-based material, the residues are non-corrosive If not cleaned. Per j-std-004b," 44" is classified as Rom1 flux.