Inflating your tube can be a tedious task. The Sportsstuff Compressor Adapter can facilitate this process using a standard bicycle tire pump or an air compressor. This adapter cannot be used on push-in style or speed-safety valves or the safety valve. It fits on the screw-on type valves or multi-valve. * Pocket sized, fast and convenient adapter * Great for trips * Works with Boston valve and multi valve * Not for use in speed safety and oversize safety valve * Great to inflate or top off the tube