Optimal Connection: Equipped with a 6.3mm unloader valve and a 1/4 inch NPT female connection, our pressure switch comes factory-set with a pressure range of 95-125 PSI. It includes a relief valve to prevent your air compressor from overload. Compatibility: Perfectly designed for both single-stage and two-stage air compressors, this pressure switch supports operations up to 125 PSI. Enhanced Flexibility: The four-port manifold design allows for versatile installation options and the addition of a relief valve, gauge, or several air outlets, enhancing the functionality and usability of your air compressor. User-Friendly Design: Featuring a built-in On/Off metal lever and an easily accessible unloader on the side, this switch simplifies operation. The 4-port base supports straightforward mounting of exhaust valves and pressure gauges. and Reliability: Set to activate the compressor at 95 psi and deactivate at 125 psi, our switch ensures consistent, safe, and dependable compressor performance. Reduce the risk of equipment failure with automatic cut-off points. Colour:Black Material:Plastic+Metal The actual product may have slight color difference or difference, which not affect the use Package Contents: 1x pressure switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.