The DIN 11851 fitting is composed of a liner, a nut, a male and a seal ring. Morsello Inox proposed a range of DIN fittings which includes: butt weld fittings, rubber hose adapters, elbows, tees and various reductions in the following sizes: DN 20, 25, 32, 40, 50, 60, 65, 80 and 100.