Stores Ref. 6D/481. Comprises a length of unbraided salmon pink rubber oxygen tube with a MK.3B* (6D/101) bayonet connector at one end and a a MK.4E 'socket' connector (6D/1306) at the other. These were used to enable the use of E-series, G-type and H-type masks in older aircraft fitted with early oxygen systems. These adaptors were also used to connect masks to portable (walkaround) oxygen bottles. The tube has surface cracking where bound to the connectors ans more is evident when flexed but is generally in good '+' pliable condition. Both alloy cased connectors show use and tarnishing but have no 'issues'. Stock code O17835.