Apeks Single Cylinder MTX-RC SetApeks MTX RC Regulator Set The Apeks Single Cylinder MTX RC Set is built for divers who prefer a long hose configuration on a single cylinder. Not only is it ideal for recreational diving, but it also supports future twinset expansion. With its military grade durability and ultra smooth breathing performance, the MTX RC is engineered to deliver reliability even in the most extreme environments, including sub zero conditions. Apeks MTX RC Set Key