Bead chain: each group is equipped with clutch, bracket, bead chain (total 3m long) and screws, it is a good helper for your curtain. Suitable for 25mm diameter tubes: The accessory kit is standard with roller shadow with 1 "(25mm) diameter tubes. Please check inside your drum blind ring before ordering. Easy to install, just a few minutes: first install holes in the ceiling or wall, then secure the bracket, can be installed on the top, side or front, can be left or right hand operation. Main material :POM and thickened stainless steel core High hardness, high rigidity, high wear resistance Blind Roll Spare parts Replacement Repair kit: This is the mounting bracket for all crank operations of external or indoor rolling blinds and can be used in offices, homes, hotels, and any other place where rolling blinds are needed. Product specification: 12x10x4cm color: White Product list: 1x Curtain control head Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.