[Home Relaxation] Heavy-Duty 11.43cm Vacuum Suction Cup with M6 Threaded Stud - Handheld Glass & Car Window Sucker, No-Drill Installation, Red-Line Indicator, for Lamps & More - Includes Protective Rubber Pad

Specifications: Material: Nylon Mount, ABS Plastic Pump, Natural Rubber Pad Cup Diameter: 4.5" Vacuum Pad: Concave Pad Application: Applied to flat or curved glass or objects(car glass) How to use: Clean the rubber pad and object to be sucked  Put rubber pad face to object, press suction cup onto object then press blue plunger a few times. When red warning line inside, you can lift or move now. Features:
Provides a reliable, temporary vacuum mount, without drilling holes. Rubber vacuum pad will not mark or damage most surfaces. Attaches to flat or curved, smooth, nonporous surfaces. Red-line indicator warns user of any vacuum loss. Check valve allows re-pumping without loss of remaining vacuum. Lift tabs on vacuum pad edges permit instant release. Supplied with vacuum pad protector