A pump on the side allows you to get a really firm hold for maximum strength. Perfect for rigging onto a car, window or other flat smooth surface. This Suction Cup from 9.Solutions is a handy piece of grip gear that will adhere to any flat, non-porous surface and support items weighing up to 4.4 lb. The suction cup has a built-in "cheese block" with multiple 1/4"-20 and 3/8"-16 female threads that offer a total of 19 mounting opportunities. The Suction Cup also has 2 clamps for 3/8" rods that can be used as small arms for lightweight cameras or for connection to additional suction cups for added strength.