Autolite Copper Resistor Spark Plug Copper-glass seal bonds insulator, terminal post center electrode together, assures full required voltage at spark gap, gas-tight seal (100% leak proof) Multi-rib insulator reduces danger of "flash-over" One-piece terminal post adds strength Resistor reduces radio frequency interference (RFI) and electrode erosion Electrode Tip Material: Resistor Reach: 1/2 In Resistor: Suppressor Seat Type: Gasket Thread Diameter: 14 mm Tip Configuration: Standard Wrench Diameter: 13/16 In Fits Select: 1970-1979 VOLKSWAGEN TYPE 1 1967-1969 VOLKSWAGEN TYPE 1 4 Cyl 1.5 L 1966 VOLKSWAGEN TYPE 1 4 Cyl 1.3 L 1973-1974 VOLKSWAGEN THE THING 1968-1971 VOLKSWAGEN TRANSPORTER 1971-1973 VOLKSWAGEN KOMBI 1966-1967 VOLKSWAGEN TRANSPORTER 4 Cyl 1.5 L 1973 VOLKSWAGEN TRANSPORTER 4 Cyl 1.7 L 1972 VOLKSWAGEN TRANSPORTER 4 Cyl 1.6 L 1966-1973 VOLKSWAGEN TYPE 3 1971 VOLKSWAGEN TYPE 4 4 Cyl 1.7 L and more - add your vehicle to our fit widget to check