The environment that an RK3 is used in will tend to dictate the size of fin that you need

the ThermiQ One is made from cozy fleece with graphene wrapped fibres

The pneumatically balanced valve provides superior performance for an alternate air source

or inserted directly into the WTX Harness

cold water compatible and extremely robust

mtx rc stage 3 dive regulator octopus Colors:Satin Chrome / Grey The environment that an RK3Go warm, go cold, go deep, go anywhere. Enjoy control in the extreme with the MTX RC scuba diving regulator. Combining rugged, military grade engineering with the super smooth breathing experience that Apeks regulators are renowned for, the MTX RC is the regulator that lets you explore more.