Oxygen Tank Knob

Someone reached out to me about getting a 3d printed oxygen tank knob. Oxygen tank knobs usually cost around $20 on ebay and amazon and they are usually 3d printed. I looked around and there weren't any print files available so I decided to make my own. Now you can print yours for around $0.30 of filament.For printing use 6 walls and 20% infill as this will make it not deform as easily as lots of the tanks can be tight.It is a tight fit at first, but this tighter fit slows deformation prolonging the life of the part.Don't crank on the knob! you are strong enough to break it if you try.