●Material: Steel, high pinion gear for rc crawler gear D90 II. ●Applicable for: 1/10 Rc Crawler D90 Provides efficient tire scrubbing with steerine efficiency ●It is also durable. Increased contact with gear surface ●High pinion gear is for mobility, and optimum drive shaft angle. New chassis structure design, high quality is excellent. ●Large bearings have been set to reduce flex and provide stronger drivetrain. Single piece axle housing for added strength This is a model part suggested for the coolest of RC Crawlers.