Group 31 Inc. 17-20020AK - TPMS Accessory Kit + Stem for Chrysler, Dodge, Mercedes Applications All TPMS accessory kits include nut, grommet, cap and core for applicable make and model TPMS accessory kits are manufactured to a specific vehicle make, model and year TPMS accessory kits include everything needed to properly service TPMS equipped wheel and tire assemblies Electroless nickel-plated valve cores