Includes (12) 694385 Spark Plugs. Thread OD:.551" (14mm), Hex:.629" (16mm), Reach:.75" (19mm). Genuine OEM Briggs and Stratton Part. Extended Life Series, Longer Life and Easier Start. Please refer to list for compatibility. Compatible with the Following: Champion 3071, 5071, 711, 71EZ, 71G, RC12YC