MG Chemicals 4900-112G SAC305, 96.3% Tin, 0.7% Copper, 3% Silver, No Clean Lead Free Solder, 0.032" Diameter, 1/4 lbs Lead free & no clean Alloy exceeds J-STD-006C and meets ASTM B 32 purity requirements Flux meets J-STD-004B About 14% longer by weight than leaded solder wires NSF - Nonfood Compounds Program Listed P1, NSF Registration #144209