Forney 48571 Super Sil Flo Brazing Rod, 1/8-Inch, 1/2-Pound The product is 1/2LB Super Sill Flo Rod Easy to use The product is manufactured in China Super Sil-Flo brazing rod is a brazing alloy that is ideal for large and small copper tubing installations Self fluxing on copper Typical applications are refrigeration control valves, joining copper wires to rotor bars, electrical connections T joints, wage joints and sleeves, couplings on return bends and condenser fitting Sil-flo is not recommended for ferrous metals such as iron or steel