This front engine insulator is built for Mack E6 engine applications, sold as a 4-pack with metal top and bottom construction. It measures 2-5/8 in. OD, with overall dimensions of 2-5/8 in. x 1-3/8 in. x 11/16 in. x 1-1/8 in. The metal construction helps buffer the engine assembly from vibration and heat transfer at the mounting point.Interchanges:40-3034610649MM62-622M2PL1131Mack 20QL312M2This unit is sold in packs of 4.FeaturesSold as a 4-pack (4 pieces)Front engine insulator with metal top and bottom construction2-5/8 in. outer diameterOverall size 2-5/8In x 1-3/8In x 11/16In x 1-1/8InFor Mack E6 engine applicationsTech SpecsOuter Diameter: 2-5/8 in.Dimensions: 2-5/8In x 1-3/8In x 11/16In x 1-1/8InMaterial: Metal top and bottomApplication: Mack E6Pack Quantity: 4 pieces