Description:Chain wheel cover guard made of plastic.Not only can protect the bike chain, but can it avoid the feet and clothes scratched by the chain.Not easily broken, long life use.Easy to install on the bike, suitable for mountain bikes, road bicycles.The protective cover is a universal product. Please make sure your bike chain size before ordering.Specification:Color: BlackMaterial: PlasticPitch: 8.5cm / 3.35" (hole distance = 8.5cm, Please note: the 8.5cm is not the screw hole distance of product , the screw hole distance is 8.4cm.)Maximum diameter of Pitch：13.5cm / 5.31"Number of Teeth: 44TNumber of Holes: 5 HolesHole Diameter: 3mm / 0.12"Dimension: 1.1x19.4cm / 0.43"x7.64"(H*D)How to choose a proper mounting tray1. The maximum number of teeth on the tooth plate is 44T2.