You receive one gray mask russian rebreather with oxygen regenerating canister
Extra canisters avalaible if you need.
IP-4M is a closed circuit re-breather that could be used in areas w the oxygen level is to low to sustain life.
The device worked by rapidly inflating an air bladder with oxygen generated by a chemical reaction in the RP-4 regenerating canister.
The bladder was housed inside the masks carrier below the regenerating canister and carried while in use and not in use.
Unit is new,not used