My husband has a 20" wheelchair and it fits just fine with room to spare. The straps on the bottom help keep it secure. Tanks slide in and out with ease, and I am more confident having the extra tank with us which sometimes we need . Takes the worry out of running out.
Got this when we took my mother on a three day trip a couple of weeks ago. It was a life saver. I can see the possibility of this not being durable long term as many are saying, but I haven't had it long enough to say. It was however, a god send on this trip! Very nice to be able to have two full E tanks so that we could be away from the house for a few hours without worry! We also have a couple of gauges so it was as simple as turning off one tank and turning on another. Worth the $42 for this trip
This is a nice product as it allows those using an E oxygen tank to get out and about without worrying if their tank is secure.