Bag of 20 TR412CS chrome sleeved tubeless snap in stems.These fit the standard .453" valve stem hole and are 7/8" long on the outside of the rim. TR412 is the shortest rubber snap in stem. These are the stubby stems used on ATV rims, lawn mower rims, boat trailer wheels, etc. These will also fit passenger car wheels if you want a really short stem. These are used on wheels that don't require a longer stem for hubcaps. Not for use on TPMS applications or applications running over 60 psi operating pressure. To install you remove the sleeve and pull the stem in the wheel then reinstall the sleeve.