Designed for Armrest 3" Wide or less. Please be sure to measure the armrest of your mobility unit to be sure this item will fit. Used on Scooters, Wheelchairs, Stadium, Airplane, and Office Chair Armrests. Attaches with Velcro straps. Stick-on padding to make for a tighter fit. Works with most Golden Technologies, Drive Medical, Pride Mobility, Shoprider, EWheels, Enhance Mobility, EV Rider, Merits Health, and many more! Light and Removable so it can be taken anywhere. Designed for Armrest 3" Wide or less, please measure your armrest before ordering. Nearly universal cup holder, but the arm rest needs to be 3" wide or less. Please be sure to measure your arm rest before ordering this product. May NOT Work with Some Permobil Models. Designed for Armrest 3" Wide or less, please measure your arm rest before ordering.