NGK CR8HSA - 10mm threads, 1/2" reach, 5/8" hex, gasket seat, resistor plug. Fits :
G230RC / G260RC / G231PUH / G260PUH / G260PU / G231PUM / G260PUM engines. Also fits Chung Yang CY23RC / CY26RC / CY27RC / CY29RC / GP290 engines.

RC Engines Spark Plug
RC Cars Spark Plug
RC Trucks Spark Plug
RC Boats spark plug
Goped Spark plug for Chung Yang Engines
Goped Spark plug for head kit engines
NGK CR8HSA Spark Plug for Zenoah RC Engines