Feature:1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Basic effects pedals with wrench and screws, suitable for beginners.4.Specially designed for replacing your guitar effects damaged or old parts .5.Made of aluminium alloy material, long time and durable use.6.Adds style and performance to your Guitar effects.Specification:Material:Aluminum AlloyColor:SilverInner diameter: about 10mmSize:23 x 11mm or 0.9 x 0.4 Inch(L x W)Weight:85gPackage include:5 x Guitar Effects cap15 x Screws5 x Wrench