Description Bosch HR9DC resistor type spark plug for small engine applications. Plug Type: Resistor Brand: Bosch Plug #: HR9DC Sold in quantities of 10. (Order 1 to receive 10 plugs) Related Products Bosch WSR7F Spark Plug MSRP: Was: Now: $5.96 Add to Cart The item has been added Bosch WS7F Spark Plug MSRP: Was: Now: $5.96 Add to Cart The item has been added Bosch FR8DCX Spark Plug MSRP: Was: Now: $41.50 Add to Cart The item has been added Bosch USR7AC Spark Plug MSRP: Was: Now: $7.94 Add to Cart The item has been added Bosch HS8E Spark Plug MSRP: Was: Now: $4.08 Add to Cart The item has been added Bosch WR8DCW Spark Plug MSRP: Was: Now: $5.62 Add to Cart The item has been added Bosch WS7E Spark Plug MSRP: Was: Now: $4.98 Add to Cart The item has been added Bosch HR10BC Spark Plug MSRP: Was: Now: $13.50 Add to Cart The item has been added