Many say this MK5 is the best first stage ever made by Scubapro. No plastic inside, All stainless steel and Brass.   One of the main reasons for buying this regulator is performance and construction   The IP. is 138 It has two high pressure ports and five on a swivel,  Can be used with Nitrox up to 40%   ..  ( , see attached pictures...  ....This is a balanced first stage.. .   All new 0-rings, static and dynamic     Comes with three port plugs and dust cap. and new seat,   with recreational  use , not much to ware out.     chrome is very nice with few minor scratches . Locks up fast and tight

Returns accepted, only if it does not meet my selling description