"The RAM-HOL-TAB4-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: 7.13"" to 9.13"" Width: 4"" to 5.31"" Depth: 0.13"" to 1.06"""