Champion DJ7J Spark Plug #850 #850C Replaces: RDJ7J BM7F SELECT: Box, Card or Shop Pack Purchase is for one spark plug Champion copper plus spark plugs are built to ISO and SAE standards for proven performance. Champion's patented SAC-9 semi-conductor resistor provides maximum EMI and RFI suppression. Champion copper plus spark plugs use TinTac and Ultraseal Shells, this eliminates the need for the use of anti-seize compound during installation by providing the best corrosion protection of any spark plug in the industry. The Champion copper plus spark plug features a copper core electrode that provides increased conductivity and heat control while delivering good overall wear characteristics. Copper core center electrode allows for accurate control of the plug's heat range, optimizing the plug's performance and adding to the longevity of the spark plug. Maintain your chain saw or trimmer's engine performance with the Champion Spark Plug for Chain Saws and Trimmers. The spark plug is designed to withstand high operating temperatures and has a 14mm thread.For use with chain saws and trimmers For use with chain saws and trimmers 14 mm thread, 8-1/4 mm reach and 5/8 in. hex Withstands high temperatures Non-resistor 2 year unlimited mileage warranty Card UPC: 037551011346 Box UPC: 037551000937 Shop Pack plugs are from a Bulk Shop Pack and are shipped wrapped in individual bubble wrap units. USA domestic shipments are shipped USPS Ground Advantage Mail with Tracking