Rubber vacuum pads not mark or damage most surfaces. Adhere to flat or curved, smooth and non-porous surfaces. The check valve allows re-pumping without loss of residual vacuum. Application: applied to glass or flat or curved objects (automotive glass) Colour: As Shown Material: plastic Package Contents: 1 x 4.5inch Vacuum suction cup Only the above package content, other products are not included. Note: Light 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.