Includes (12) 4163 Spark Plugs. Thread Size: 12mm Thread Pitch: 1.25mm Seat Type: Gasket Reach: 19mm (3/4 ). Hex Size: 11/16 (17mm) Terminal Type: Removable Nut. Material: Nickel Type: Necked Down Projection: Projected. Copper core improves resistance to fouling. . Compatible with the Following: Bosch: 7701 XR4CS Y5DDC Champion: 809 8809 9FYSR 9FYSSR A6HC A6Y A6YC EON5 OE004 OE005 OE083 OE111 RA6HC RA6Y RA6YC RN10Y RN10YC RN281YC RN8YC RN9Y RN9YC RN9YCC RN9YCE RN9YCX NGK: 1030 2202 2268 2755 2872 2923 2933 3025 4730 4830 4929 5423 5686 5829 6464 6681 7822 7839 7912 843 847 BP6E BP6ES BP6ES-A BP6ESZ BP6EZ BPR6E BPR6E-11 BPR6ES BPR6EZ D7EA DP8EA-9 DP8EV-9 DP8EVX-9 DPR8EA-9 DPR8EIX-9 DPR8EV-9 DPR8EVX-9 DPR8Z DPR9Z DR7EA DR7EIX DR8EA DR8EIX DR8ES DR8ESL DR8ES-L Torch: D8RC D8RP D8RTC D8TC