This is the Long Reach O.S. Max LC4 Medium Heat Range Glow Plug. 

FEATURES: 

Ideal for 1/10 scale off road engines such as the Traxxas TRX2.5 and 3.3T engines 

and the O.S. .21 TMs Like all O.S. Max glow plugs, the LC4 is tough enough to take 

the heat and provide hassle-free starts and outstanding durability High-performance 

long reach glow plug suitable for 1/10 scale off-road applications that require constantly 

varying speed The LC4's longer reach extends coil farther into the engine's combustion 

chamber improving combustion for better idling and good acceleration throughout the 

throttle range Compatible with Traxxas's EZ-Start system Medium heat range for fuels 

with 10%-20% nitro content No idle bar 

INCLUDES: One O.S. Max LC4 Hot Glow Plug with brass washer 

REQUIRES: Glow plug wrench