Original Name / Part No.: AR310781Part location: Rear gearbox areaProduct major functions & usage: Protect transmission gears and stabilize motor. Special design with heatsink fins for fast cool down.Accessories:Motor Mount 2pcsStabilizer 1pcStainless Steel Button Head Screw 3x10 2pcsStainless Steel Button Head Screw 3x14 3pcsStainless Steel Flat Head Screw 3x8 2pcs