Accessories:Brake Disk-2pcsM4x2x12 Screw Pin-2pcsManual number:LOS232009+LOS233006+LOS232006Product major function & usage:1. Combine wheels and front & rear wheel shaft for smooth turning2. A good decoration partMajor advantages of upgrading to this product:1. Modern metallic design with swirl engraving on the outer ring.2. Compare with original 9.3mm, this part is made 10.8mm to widen the wheel track for better stability of the chassis.We use a quality light weight high tensile strength aluminum 6061 T6 and is then anodized with scratch resistant colorsWe also have a big selection of multiple colors available now!! Let¡¯s ¡°hop up¡± your vehicles to give them the best looks and performance on the market ¡¦ colors are available in blue, red, grey silver/gun metal, orange, green, black, brown