Environmentally dry sealed version of the US4 1st stage with 4 medium pressure ports and one high pressure port. Adjustable intermediate pressure. Finished in highly polished chrome. 1st stage ports: 4 x 3/8 UNF and 1 x 7/16 UNF. A work horse with years of tested and proven experience now preferred by the most demanding technical divers.

 

Available also in turning turret form as the Apeks DST model for any use and outstanding performance especially for side-mounted stage cylinders.