1. The tank cover can stay in a constant pressure system. 2. Keep the cooling system in high or low temperature will not fail. 3. in use, high quality material. 4. A perfect replacement for your car. Maximum pressure: 145 kPa Part number: 1301104 3M5H-8100-AD Shutdown state: less than 21 psi The tank cover can stay in the constant pressure system. colour: black material: ABS Package Contents: 10 x Radiator Cap Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.