The On/Off button of the (excellent) SKS AirChecker pressure gauge is easily pressed when in your bag. This is a simple cover to protect the On/Off button.

There's a little interference nub that prevents it from falling off.
 

Check https://www.thingiverse.com/thing:5277309 if you have the old style AirChecker

Print it in the upright orientation.

Category: Hand Tools