Qty 1 = 4 stems. Price is for a set of 4 valve stems with torx screws only, you reuse your sensors. These are ONLY for Chrysler, Dodge, Jeep, Ram vehicles equipped with rubber snap in tpms stems where the sensor attaches to a SQUARE post on the back of the valve stem with the torx head screw and the tpms sensor can be removed. See second picture. For some reason Chrysler Corp decided to use an oddball made in Italy stem with square post where the sensor attaches when everyone else used a Double D end. They cost nearly $20 each through the dealer.These are Dill brand replacements for the OE 68206635AB Mopar stems. Buy 4 that exceed OE quality for the price of one through the dealer.