NGK Spark Plug B1CMR7A (QTY OF 4) Solid copper core for greater spark Longer insulator nose prevents fouling Corrugated ribs on insulator prevents flashover Zinc dipped shell prevents corrosion Triple gasket seal eliminates combustion gas leakage. B1CMR7A. Crossed from: CMR7A NGK, 130-348, 9593 ROTARY, 0000 400 7011 STIHL. Fits models: NGK : SEVERAL. This is an Aftermarket Part. Thanks for looking!