Stop end. For use on copper tube.- Yorkshire Portable Integral Solder Ring (ISR) capillary fittings in sizes from 6mm to 67mm contain a ring of high quality lead-free solder. When heat is applied, the solder is released into the gap between the tube and the fitting, creating a reliable joint without the need for end-feeding additional solder.
Manufactured to BS EN 1254 / BS 864 part 2. Designed for jointing copper tubes to BS EN 1057 (R220, R250 and R290) in a wide range of applications.