XS Scuba 300 Bar DIN valves feature XS Scuba's Safety Handwheel ... so you don't have to guess if air is on or off! XS Scuba 300 Bar DIN valves feature RH or LH modular manifold extension and standard 3/4"-14 inlet threads. For steel and aluminum cylinders to 3442 psi working pressure. Use with #36106 XS Scuba isolation manifold crossbar. Dip tube included (not shown). For use with up to 40% pre-blend oxygen mix.