The NGK Spark Plug BR9ECM is a standard spark plug with an SAE connection, designed to meet the highest quality standards. This reliable and efficient spark plug features a wrench size of 20.8mm, a thread diameter of 14mm, a thread length of 19mm, and an electrode gap of 0.8mm. Recommended by the manufacturer for various engine types, please verify manufacturer specifications before placing an order. The NGK brand is well-known for its durability and performance, making it a preferred choice for both professional mechanics and enthusiasts.