The RAM-HOL-TAB30-CUPSU includes (2 qty) Tab-Tite cup ends and hardware. The interchangeable support cups can be used, along with all RAM Tab-Tite and Tab-Lock mounts; these include the universal backplate that support all TAB cups. Hardware is included to attach the cup ends to the backplate. Cup End Dimensions: Height: 7.82″ to 10.375″ Width: 4.75″ to 5.375″ Depth: 0 to 0.3125″