Bead chain: each set includes a clutch, bracket, bead chain (3m total length), and screws, designed to assist with curtain operation. Compatible with 25mm diameter tubes: this accessory kit fits standard roller blinds with 1" (25mm) diameter tubes. Please verify the tube diameter inside your roller blind before purchasing. Easy to install in minutes: simply drill holes into the ceiling or wall, then secure the bracket. Can be mounted on the top, side, or front, and supports left or right-hand operation. Main materials: POM + reinforced stainless steel core; offers high hardness, rigidity, and wear resistance. Blind Roll Spare Parts Replacement Repair Kit: mounting bracket suitable for crank-operated outdoor and indoor roller blinds, ideal for use in homes, offices, hotels, and other locations. Product dimensions: 12 x 10 x 4 cm. Color: White. Package includes: 1 x Curtain control head