Bottle and needle point encased in a 6-1/4" clear plastic tube

Durable steel gears with dual ball bearings

Precise factory fit

RC4WD Hi-Lift Jack Handle-Keepers (Z-S1770)

which creates more rotation and forward drive

HPI Piston Set (0.7mm Piston Ring/23cc) Increases Engine Throttle Response Lazer ZX Parts Bottle and needle point encasedHPI Piston Set (0. 7mm Piston Ring 23cc) Increases Engine Throttle Response This is a genuine HPI Racing piston set with a 0. 7mm piston ring for 23cc gasoline engines. The lighter 0. 7mm ring reduces friction and reciprocating drag inside the engine, which is what delivers the sharper throttle response this set is designed for. It installs during a standard top end service, making it a smart upgrade to fit while refreshing a worn piston and ring.