Marson USA 5.5" Motorcycle Wheel Chocks T101-ETRACK - SS Constructed of 1" heavy duty stainless steel tubing. E track sold separately. Dimensions: Exactly 8.25" wide at the opening and 5.5" wide at the start of the radius x 9.25" high. This listing includes one wheel chock, one etrack mounting plate, and the hardware. Corrosion proof - it will never rust.