Apeks MTX-R OctopusThe octopus uses the same second stage as the MTX R , with simple to use with no dive adjustment controls and reduced chance of free flow occurrence, pre settable cracking effort or venturi control by an Apeks approved qualified technician Large, diver friendly self flushing controllable purge button Front cover with over moulded elastomer incorporates a formed chrome plated brass plate improving durability of the second stage Reversible second stage