XTX200Nitrox Regulator - Top of the Apeks Nitrox Range. As with all XTXregulators it can be converted from a right hand configuration to a lefthanded one. The regulator also features a reversible Venturi System andcomplete diver adjustable breathe control. The Diver Changeable Exhaustsystem gives the diver the ability to change from a more compact smallexhaust to a larger exhaust tee which helps bubble diversion. This is anextremely rugged, high quality regulator.