Item NO : SA1900&SA1902 Features: AEG Bevel Gear / Umbrella gear Double Sector Gear 1）Material：Steel 2）For： Ver.2 / Ver.3 / Ver.6 Etc. Gearbox 3）Unique gear with extremely fine design, and with Nano-Class surface treatment. 4）Significantly improve its anti-fatigue strength and extend the service life. 5）Substantially reducing the friction coefficient of the gear. 6）Noise reduction
