Performance High Friction Rear Disc Brake Pads for 150cc and 125cc 4-stroke QMJ152/157 QMI 152/157 GY6 engine based Sport Style scooters. Fits other makes and models. Specifications Length: 77mm Bolt Hole Spacing: 40mm Thickness: 7mm Supported Models JM Star Tomahawk II, X-Treme, Qingqi, SUNL, Various unlisted makes/models, Tank, Roketa, Baja