APEX DESIGNS - Flip To Deflate Cap - 4PKThe Flip to Deflate Cap offers an affordable way to quickly deflate your tires for off road use. This handy valve stem cap features a deflator built in to the cap so it is always there when you need it. HOW IT WORKS: 1 Remove the cap from your valve stem and remove the rubber cover 2 Flip the cap over and screw back onto your valve stem (The cap depresses your valve core and deflates your tires). 3 Monitor your tire pressure until you reach your