Apeks 29" medium pressure drysuit inflation hose with Seatec coupling and 3/8" UNF male thread for connection to any regulator. This is the hose that most drysuit manufacturers use with Apeks inflation valves fitted to their suits. The standard 3/8" UNF male thread is compatible with all regulator female LP ports. 

Standard 29" hose

Seatec coupling

3/8" UNF male thread compatible with all regulator LP ports