MaterialMake of Aluminum Alloy material, ensures the pump is fixed in place to improve reliability and safety. Inner DiameterInner Diameter(with rubber): 43mm / 1.69', Inner Diameter(without rubber): 53mm / 2.09' Single HoleThe Fuel Pump Bracket will hold single Fuel Pumps. Package Include1 x Fuel Pump Clamp Bracket Function The Fuel Pump Clamp Bracket is suitable to fix the fuel filter or fuel pump on the car.