This is the Stock Replacement Slipper Plate for the HPI Nitro Rush. This part is located on the spur gear. Stainless steel construction One slipper plate Installation on the vehicle Outer diameter: 33mm (1.30") Inner diameter: 16.5mm (0.65") Thickness: 1.4mm (0.06") This part is specific to the Nitro Rush. cmc 03/11/02 ir/kh cnh 11/5/09 &