I'll have to check, at first they would hold any pressure because the spring loaded valve needs some bit of pressure to close, so I had to hold them closed until some pressure built up. Then around 100psi they started leaking again and I just gave up for the night. I'm going to check out the ones they have at harbor freight tomorrow. I believe they are very similar to the SMC ones, they have a metal cage around the bowl part so I think they are made to hold more psi. I use the HF one on my garage compressor up to 140 with no issues.