Accessories:Gear Cover-1PCSStainless Steel Cap Head Screw 1.4*5-2PCSOriginal Name / Part No:AXI316068Product major functions & usage:To protect the main gear and motor gear from impact. Also helps cool down the motor heat.Major advantages of upgrading to this part/product :1. Made with a quality light weight high tensile strength aluminum 6061 T6 for good protection and heat cooling.2. Distinctive 3D streamline showing a modern appearance.