Autolite® Copper spark plugs deliver quick starts, good fuel economy and smooth acceleration. High nickel alloy side electrode resists electrical and chemical wear providing excellent durability Heat-fused glass composite resistor center seal provides high performance EMI noise suppression and a 100 percent leak-proof seal 2 year limited warranty High alumina multi-rib insulator helps prevent flash-over which can lead to misfires One-Piece terminal stud provides a reliable high voltage electrical connection Solid copper core center electrode provides optimal thermal and electrical conductivity for better performance in all driving conditions Package Dimensions: 1.00 x 1.00 x 3.38 inches Package Weight: 0.108 lb Package Quantity: 1 UPC: 009100007667 Center Electrode Core Material: Copper Center Electrode Design: Standard Center Electrode Projection: Mid Projection Center Electrode Tip Material: Nickel Electrical Terminal Type: Stud Ground Electrode Core Material: Nickel Ground Electrode Quantity: 1 Ground Electrode Tip Design: Tapered Ground Electrode Tip Material: Nickel Hex Size: 16 MM Hex Size: 5/8 IN Insulator Material: Ceramic Pre-Gap Size: 0.044 IN Pre-Gap Size: 1.1 MM Reach: 17 MM Reach: 0.679 IN Resistance: 5000 82 Resistor Type: Yes Seat Type: Tapered Thread Diameter: 14 MM Country of Origin: CN