H54L NH Male x NH Female Swivel Long Handle Threaded Adapter Dark AnodizedThreaded adapters available from 1. 5 to 6. All adapters provide the necessary safety features for municipal fire fighting. Storz adapters 4 and larger feature a locking mechanism. British instantaneous adapters, NST adapters and other European adapters are available upon request. All threaded adapters are hard coated to military spec. Type 3 and made from aircraft #6061 T light weight aluminum. All female swivels utilize stainless steel ball bearing