Description [50KG SUCTION CUPS] Secure and Accommodate Heavier Rigs [COMPATIBLE] with the Speed Rail Car Mounting Kit or Any 50mm Speed Rail [ADJUSTABLE CLAMPS] Allow Easy Vehicle Mounting on Most Surfaces [EXPAND YOUR RIG] via Additional Suction Cups [DURABLE] Aluminum, Stainless Steel, and Rubber Construction This high capacity Suction Cup is individually rated for 50 kg or around 110lbs. These Suction Cups connect to 50mm speed rail via adjustable clamps, allowing them to be placed in almost any position in order to accommodate most vehicles easily. Utilizing multiple Suction Cups allows you to build an incredibly stabile foundation in which to mount shock absorbing arms or other equipment. This Suction Cup functions as a replacement for the ones included in the Speed Rail Car Mounting Kit and can also be used in addition to the original kit to build larger or more secure rigs._1.Suction Cup（Big）(5.03.219-000000-007.00)*1 2.6mm Allen Key(4.04.199-000000-089.00)*1_Dimensions: 11 x 7.5 x 5 inches Weight: 2.2 lbs Materials: Aluminum alloy, stainless steel Color: Black