The grenade tire valve caps are caps for your tire valves on your car that are shaped just like mini grenades and if there are still kids around like when I was young, don't expect to have them on your tires for more than a few days before they are stolen. For some reason when I was a kid I thought chromies were more valuable than gold and had a nice stash of them that may or may not have come from bikes and cars around town. The grenade shaped tire valve caps come in a plethora of different colors to choose from, come in a package of 4 caps, measure 1.3 inches long x 0.73 inches wide, and are sure to make you the coolest kid in your town (to 12 year olds).