"The RAM-HOL-TAB20-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: 9.5"" to 12.125"" Width: 6.55"" to 7.43"" Depth: 0.3"" to 0.875"""