Bead chain: each group includes clutch, bracket, bead chain (total 2m long), and screws, designed to assist with curtain operation. Suitable for 25mm diameter tubes: the accessory kit is compatible with roller blinds featuring 25mm diameter tubes. Please verify the tube size inside your blind before ordering. Easy to install in just a few minutes: first drill holes in the ceiling or wall, then secure the bracket. Can be mounted on top, side, or front, with left or right-hand operation. Main material: POM + thickened stainless steel core; offers high hardness, rigidity, and wear resistance. Blind Roll Spare Parts Replacement Repair Kit: this mounting bracket fits all crank-operated external and indoor rolling blinds, suitable for use in offices, homes, hotels, and other locations requiring roller blinds. Product dimensions: 12*10*4cm. Color: White. Package includes: 1 x Curtain control head