Our distributor caps are made of high dielectric strength, glass/mineral reinforced polyester resin for less carbon tracking, greater resistance to electrical breakdown, and superior performance RFI resistors where specified to eliminate radio static and potential ECU-damaging spikes Capitalizing on decades of research and development, our distributor caps and rotors contain unmatched quality yielding superior performance As a global manufacturer of original equipment ignition products, we maintain complete quality control throughout the manufacturing process from componentry to finished product Solid brass terminals (where available) make better connections and greater resistance to electrical pitting and corrosionPackage Dimensions: 4.250 x 3.438 x 4.250 inches Package Weight: 0.29 lb Package Quantity: 1 UPC: 091769001728 Contents: Distributer Cap Distributor Vent: No Country of Origin: US