A sturdy cupholder for Permobil power chairs featuring armrests with the Uni-Track rail system underneath. This cupholder is designed to accommodate most popular sized bottles, tumblers, mugs, cans, pint glasses, and more. The opening is 3.5 inches at the top, tapers down to 3.2 inches at the bottom, and is just a smidge over 3 inches deep. What’s included: 1 heavy-duty 3d printed cupholder for PERMOBIL power chair 1 mounting screw 1 washer Required tools: 4 mm Allen wrench/key (if you need one, select the option in the drop-down menu) INSTALLATION:This cupholder is extremely simple to install. Just slide it into the Uni-Track rail on the front of your Permobil armrest and you’re set! For a more secure option, insert and tighten the included retaining screw with washer. Compatible with M3, M5, F3, F5, M300, and any other Permobil power chair armrest with a Uni-Track. If you ever have any questions or need any help at all, please don’t hesitate to ask and I will do my best to help in a timely fashion Items usually ship the next business day or sooner.. Like all the 3d printed parts I sell, this cupholder was designed by and used by myself on my own personal wheelchair. Quadriplegic since 95′. Thanks for looking!