Bike Pump to Coleman Air Mattress Adapter (schrader valve)

Simple insertable adapter for pumping up a Coleman air mattress using a bike pump or electric pump with a schrader valve (the valve commonly found on generic bicycle and car tires etc.).

May work for other inflatables with similar valve (other brands of air mattress, kayaks, large pool toys?). Not entirely sure, but the coleman valve may be what's referred to as a "boston valve"? Feel free to comment if anyone knows!

Note: There is a tiny bit of overhang at the "over insertion stop" so take that into consideration when adjusting printer settings (i.e. don't print exterior perimeters/shells/walls first).