can you please advise whether this 1st stage is for nitrox?
SERGEY N Steve,
if by nitrox you mean < 40% O2 then yes. If you plan to use it for oxygen I cannot say for sure. I did a research before buying and SP claimed that MK2 would work for O2. They are O2 clean and the o-rings are O2 compatible (EPDM) the seat of the Plus release seems to be O2 compatible.
Anyways I bought it for 02 use but have not yet had a chance to use it for o2
Celwyn W Yes the Scuba-pro MK2 is Nitrox compatible to 40%.
GRAHAM S Very simple, very reliable and value for money.
I have a yolk adapter which works great with this.