Features: 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 information; 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed. 3.This product is suitable for 2020 European Standard Aluminum. 4.Installed in the aluminum surface, both to increase the aesthetic and can guarantee safety. 5.There is only one hole on the inner surface. 6.It is made from plastic. Specifications: Material:Plastic Color:Black Size:2x2cm/0.79x0.79""(LxW) Weight:15 g Package include: 20 x Extrusion End Cap