Product DescriptionReducer. Larger end for insertion into fitting.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. Suitable for use on hot and cold water services for potable water, in small bore and mini bore central heating systems, and in low pressure steam heating and pressurised unvented heating systems and in chilled water applications. Also suitable for sanitation services, compressed air lines, gas distribution systems and engineering pipeline services that convey liquids, oils, air and gases at temperatures up to 110°C. Kite mark and WRAS ApprovedProduct FeaturesManufactured 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.