For C-Stands, For Poles with a 1.5 to 1.97" Diameter Take your laptop and its components from place to place without disassembling it with this Proaim Alpha Workstation Tray for Laptop and Case. This tray not only gives you freedom and peace of mind but also increases your efficiency. Transform your C-Stand into a standing and moving laptop workstation that you can take anywhere. It also holds an optional pelican case.