This product is designed for business contractors. This non-spill type prevents liquid from dripping when removed. The air entering the channels is very slightly. Specifications: Body; Compatible tube size: Inner diameter: 1/4-28; Material: Body, Valve: PP with glass fiber, PEEK, PP, Push Button: PEEK, Spring/SUS316, O-ring/EPDM (Ethylene rubber); Usable Temperature Range: 0 - 49 °C; Working Pressure: Vacuum - 0.1 MPa; Panel Mount: Applicable thickness of panel mount type approx. 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.04 - 0.3 mm Panel hole diameter: approx. Φ12.7mm