The platinum-to-platinum design of Autolite®Double Platinum spark plugs greatly decreases gap erosion and reduces misfires. These are superior-performing spark plugs for distributorless ignition system (DIS) engines.. Platinum enhanced high nickel alloy side electrode maintains precision gap Featuring a platinum-to-platinum firing that virtually eliminates gap erosion and reduce misfires over a longer life Full-platinum tips; platinum on both the center and side electrodes to promote reduced gap wear Heat range precisely set by Ionization Sensing Technology Get up to 3X longer service life compared to standard copper plugs Super conductive yttrium enhanced ground electrode provides superior heat transfer Package Dimensions: 1.00 x 1.00 x 3.38 inches Package Weight: 0.113 lb Package Quantity: 1 UPC: 009100260345 Center Electrode Core Material: Copper Center Electrode Design: Standard Center Electrode Projection: Mid Projection Center Electrode Tip Material: Platinum Electrical Terminal Type: Stud Ground Electrode Core Material: Nickel Ground Electrode Quantity: 1 Ground Electrode Tip Design: Tapered Ground Electrode Tip Material: Platinum Hex Size: 16 MM Hex Size: 5/8 IN Insulator Material: Ceramic Resistor Type: Yes Seat Type: Tapered Thread Diameter: 14 MM Country of Origin: US