Autolite® Copper spark plugs deliver quick starts, good fuel economy and smooth acceleration. 2 year limited warranty High alumina multi-rib insulator helps prevent flash-over which can lead to misfires Solid copper core center electrode provides optimal thermal and electrical conductivity for better performance in all driving conditions Heat-fused glass composite resistor center seal provides high performance EMI noise suppression and a 100 percent leak-proof seal High nickel alloy side electrode resists electrical and chemical wear providing excellent durability One-Piece terminal stud provides a reliable high voltage electrical connection Package Dimensions: 1.00 x 1.00 x 3.38 inches Package Weight: 0.136 lb Package Quantity: 1 UPC: 009100945617 Center Electrode Core Material: Copper Center Electrode Design: Standard Center Electrode Projection: Short Projection Center Electrode Tip Material: Nickel Electrical Terminal Type: Removable Nut Ground Electrode Core Material: Nickel Ground Electrode Quantity: 1 Ground Electrode Tip Design: Tapered Ground Electrode Tip Material: Nickel Hex Size: 21 MM Hex Size: 13/16 IN Insulator Material: Ceramic Pre-Gap Size: 0.03 IN Pre-Gap Size: 0.8 MM Reach: 9.5 MM Reach: 0.374 IN Resistance: 1 82 Resistor Type: No Seat Type: Flat Thread Diameter: 14 MM Country of Origin: CN