Octopus Compact uses the same casing as the Compact model made from special hi-tech polymers, the only difference being the yellow front cover.

This regulator is made up of the new 2nd stage Compact, combined with the MC9 diaphragm first stage and the Octopus Compact, that uses the same casing as the Compact model made from special hi-tech polymers, the only difference being the yellow front cover.