Features : Less residue bright spot reliable. Soldering performance is good. During soldering spatter less smoke less smell feel relaxed. Corrosive small. Easy to carry and it is sure an electronic enthusiasts essential gadget. Specifications: Name: 63/37 rosin core solder Flux: 2.0% Color: silver Wire diameter : approx 1mm Melting point : 361F/183C Total wire lenght of one reel : approx 1400cm/45ft Net Weight:100g/3.5oz Package Includes: 1 x Reel of 63/37 Soldering wire