Bead chain: each group is equipped with clutch, bracket, bead chain (total 2m 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 + 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/indoor rolling blinds and can be used in offices, homes, hotels, and any other place where rolling blinds are needed. Product specification: 12*10*4cm color: White Product list: 1* Curtain control head When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don't hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it!