4.5" Vacuum Cups, capacity 40 lbs each</br>(one pair included)

"Powerful suction keeps tools in place inside your glovebox!" Choose either threaded hole cups (1/4-20) or threaded stud cups (1/4-20 x 3/8" length).  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 repumping without loss of remaining vacuum Lift tabs on vacuum pad edges permit instant release Supplied with vacuum pad protector Specifications: Vacuum Pad: Concave, 4-1/2" [11 cm] diameter Minimum Radius for Curved Mounting Surface: 12" [305 mm] Height to Mounting Platform (does not include stud): 2-1/64" [51 mm] on flat surfaces;2-13/64" [56 mm] on surfaces with maximum curvature. Load Capacity: 40 lbs [18 kg] per vacuum cup