Review on 💨 SÜA Oxygen and Acetylene Regulators Welding Gas Gauges – Pair, Rear Entry - LDP Series: Secure Precision Control for Welding Operations by Balthazar Cooper

I wouldn't inflate a balloon with this. 1500 psi in the tank, the gauge reads 1000. Set it to 20, pull the trigger on the burner, it will drop to 18. Turn off the tank, it will go up to 50. Bought at the port for 70, works fine. I've used 2 stages my whole life but one was leaking and didn't need the expensive one for infrequent retirement use. it's not, it's terrible and probably unsafe.