Pinch Valve Adapters for a Coleman 12 Volt pump for blowing up air an mattress, Dingy and other inflatable things. I kept losing my adapters every time I go camping, so I thought I'd model and print out my own bright pink versions. They should be easy to find in the grass. If I do end up losing them I can always print more now. :) I made one specific to fit my Dingy which has a screw on valve. I think it is a common size and others might find it useful.I printed it out in PLA, you will need to add support where the open groove section of the end that connects to the pump.