The RAM-HOL-TAB8-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: 8.75" to 10.75" Width: 6.38" to 8.31" Depth: 0.13" to 1.12"