This product is made of acetal injection molding, so it is highly durable and can be used on a wide range of fluids. Specifications: Body; Tube Size: Inner Diameter: 1/4 inches (1/4 cm); Material: Body, Valve, Acetal, Latch, External Spring Pin: Stainless Steel, Valve Spring/SUS316, O-Ring/NBR (Nitrile Rubber); Usable Temperature Range: -40 to +82 °C; Working Pressure: Vacuum ~0.84 MPa