Bead chain: Each group is equipped with a clutch, bracket, bead chain (2 m long in total) and screws, which makes it a good help for your curtain. Suitable for 25 mm diameter tubes: The accessory kit is standard with roller blinds with 1 (25 mm) diameter tubes. Please check the inside of your roller blind ring before ordering. Easy to install, only takes a few minutes: first install holes in the ceiling or wall, then attach the bracket, can be installed on the top, side or front, can be mounted with left or right hand operation. Main material: POM + thickened stainless steel core; High hardness, high rigidity, high wear resistance. Roller blind spare parts repair kit: This is the mounting bracket for all crank operations of external/indoor roller blinds and can be used in offices, homes, hotels and all other places where roller blinds are needed. Product specification: 12*10*4cm color: White. Product list: 1* Curtain control head