This special acid core wiping solder is for soldering lead objects like cable sheath or sleeving

• The flux is single pressed stearic acid, surrounded by an alloy of 35% tin, 64% lead and 1% antimony.

Two types are available, The elliptical B Solder has a .125 in. x .188 in. (3.2 mm x 4.8 mm) cross section, while the cylindrical C Solder has a .094 in. (2.4 mm) dia. that's ideal for soldering pressure testing flanges and ells to lead cable.