These are the stock TPMS caps that OEMs use on the black rubber valve stems. I went to Discount Tire to change the tires on my 2007 Mustang GT along with the stock TPMS system. Not only did they leave the original TPMS on the wheels, they accidentally used 4 different valve caps. These valve stem caps slide over the rubber base of VDO TPMS sensors while OEM Ford valve stems fit perfectly. Overall: 5/5 stars.