Accessories:Stainless Steel Round Head Screw 3x12-2pcsStainless Steel Flat Head Screw 3x14-2pcsManual number:AR330378+AR330379Product major function & usage:Stabilize front lower armMajor advantages of upgrading to this product:Made with a quality light weight high tensile strength aluminum 6061 T6 to reduce gap and more stable to use.Inserted with POM for better strength with flexibility to minimize the gap of the hinge pins in order for the arms to be more stable when in motion.Other special notes and commentsSuitable for Arrma Kraton, Senton. Typhon, Talion