Solder Wire: Type - Cored Solder Wire; Alloy - Material Type - 96.5/3/0.5 Tin/Silver/Copper; Alloy - Element Listing - Sn96.5Ag3.0Cu0.5; Wire Diameter - 0.031" (0.787 mm); Core Type - Rosin; Core Size - 66; Package Type - Spool; Size - Weight - 1.00 lb (0.45 kg); Manufacturer Series - Kester 48