The Catalina Aluminum 53cuft. scuba cylinder is made of aluminum alloy and does not rust. A Pro-Valve is included with the cylinder. The Pro-Valve allows you to use a DIN or Yoke 1st stage regulator.
Thread Size: 0.750-14 NPSM
Working Pressure: 3000 psi
I like the bailouts with that clear epoxy finish over them. They seem to last a bit longer to the wear and tear offshore. Haven’t bought a bailout in a few years, don’t remember them being that expensive, but that could be entirely me.