Superior construction for serious power Versatile plus with wide operating heat ranges prevent fouling from running too cool and pre-ignition from running too hot. Features include high-alumina ceramics for improved heat dissipation and electrical insulation, deep seated copper core for a wider heat range and a nickel alloy tip for longer life. 12mm thread 3/4" reachFeatures & Specifications Manufacturer Part Number: 3932 UPC: 0087295139325 Triple gasket sealing process eliminates gas leakage past the shell 99% Highly pure alumina silicate insulator Solid copper core Corrugated ribs to prevent flash over Cold rolled threads to prevent damage to cylinder head Trivalent plating - silver chromate and zinc for corrosion resistance Sold in standard packs only Model Number: DCPR7E Package: Boxed Quantity: 4