The current XTX series first stages differ in the orientation of their ports and cosmetics. Although their price varies, they are all over-balanced diaphragm design with an environmental seal and they all use the same periodic service parts kit. All the Apeks regulator packages are EN250 certified to a depth of {660 fsw | 200 msw} and have identical extreme performance breathing characteristics that make Apeks XTX regulators a popular choice of experienced sport and technical divers worldwide.

For a deeper explanation of all the model variations read our TekTip Apeks XTX Series First Stage Differences.