This E Size Oxygen Tank Holder is a very safe and inexpensive way of carrying your oxygen cylinder on the back of your wheelchair or scooter. For carrying E size oxygen tanks and smaller size tanks. Constructed of high quality water-resistant fabric. Designed for stability on wheelchairs with push handles and scooter style seats. Choose Oxygen Tank Holder for wheelchairs with push handles, or for scooter type chairs without push handles. Great for wheelchairs, power wheelchairs and scooters. For chairs without push handles, slide the adjustable horizontal strap of the harness over the seatback and then tighten. For manual wheelchairs, slide the straps over the push-handles.