The RAM-B-132-400U consists of the small Tough-Claw base and RAM Level Cup Self-Leveling Drink Holder; koozie is included The drink cup holder has two pivot points, allowing for your drink to always stay upright and never spill The compact design allows easy installation in a wide variety of applications including motorcycles, kayaks and boats, bicycles, wheelchairs, medical carts and more Compatible Drink Size: 12-16 oz; Compatible Drink Dimensions: 2.5" - 3.5" Diameter; Rail/Tube Clamp Range: 0.625" - 1.5" Diameter; Flat Surface Clamp Range: 0" - 1.14" Backed by a lifetime warranty