This is a A-B1BPMR4ASD NGK6028/4PK REPLACES ROTARY #8358 PN: B1BPMR4ASDMain Description As Following : A-B1BPMR4ASD NGK6028/4PK REPLACES ROTARY #8358 PN: B1BPMR4ASD Found in Section & Models : Sunbelt - Electrical > Spark Plugs, NGK (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Solid Terminal Nut NGK standard plugs are constructed for longer life and optimum performance. Trivalent metal plating provides superior anti-corrosion and anti-seizing properties Corrugated ribs prevent flashover Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer Copper core aids in heat removal Triple seals prevent leakage Seat Type: Gasket Resistor Value: 10K Ohm Reach: 9.5mm (3/8") Hex Size: 3/4" (19mm) Terminal Type: Solid Gap: .028" (0.7mm) Quantity: 4 Thread Size: 14mm