Not much to say really. I bought a pair of these (one rated at 60psi and the other rated at 100psi) for the airbag suspension system and, well, the needles bounced when inflated (I know I forgot to check that it was a liquid-filled gauge acted) and constantly leaking. They have since been replaced with a dual needle gauge, everything else being the same, and with a new gauge (different caliber, different brand) it worked perfectly. Who knows if I got a bad block or what actually happened, but at the end of the day I definitely wouldn't buy them again. EDIT: The seller offered to replace or refund the sensor. The refund offered was for one of the 2 sensors and it hasn't hit my account yet, so in the meantime I'm updating the overall rating from 1 to 3 stars.