Includes (12) 64 Spark Plugs. Thread Size: 14mm Thread Pitch: 1.25mm Seat Type: Gasket Reach: 19mm (3/4 ). Hex Size: 13/16 (21mm) Terminal Type: Removable Nut. Center Electrode: Material: Nickel Type: Standard Projection: Projected. Copper core improves resistance to fouling. Compatible with the Following: Bosch: 7500 7501 7509 7900 7909 W175T30 W175TR30 W7D W7D0 W7DC W7DC0 W7DCT W7DCX W7DT W7DTC W7DX W8LCR W8LPR WR7D WR7DC WR7DCX+ WR7DPX WR8DC WR8LC Champion: 302 320 321 322 41 917 N10Y N10Y4 N11Y N11YC N11YC4 N92Y OE049 OE101 ON11Y RN10GY RN10Y RN10Y4 RN11Y RN11YC RN11YC4 RN11YCC4 RN14MC5 RN14YC RN7YC RN9YC4 XN10Y NGK: 1233 2140 2851 3664 4006 4728 5685 5839 6029 6937 7327 7634 7732 7734 7822 7832 910 911 920 927 935 942 BP5EQ-13 BP5ES BP5ES SOLID BP5ES-11 BP5EY BP5EY-11 BP6EQ-13 BP6ES-13 BPR5EKU BPR5ES BPR5ES-11 BPR5ES-13 BPR5ES-15 BPR5EV BPR5EY BPR5EY-11 BPR6ES BRE527Y-11 BRE529Y-11 GR4 GR5 V-line-2 ZGR5A