Constructed from iron material, this accessory offers exceptional durability and reliability, ensuring prolonged use. The unique hook design simplifies the installation process, providing a secure and stable attachment that won't easily detach. The spring hanging piece allows for flexible adjustment of the roller blinds' lifting speed, catering to individual preferences. Its external sunshade function effectively blocks sunlight and heat, maintaining a cool and comfortable indoor environment. Suitable for various roller blinds, it optimal light-blocking and sunshade effects while enhancing privacy. Features -Color:Assorted Color -Material:Iron -Size:20.00X10.00X0.70cm/7.86X3.93X0.28in -Iron material for exceptional durability: the use of iron material ensures that the roller blinds are highly and long-lasting. -Reliable performance, ensuring longevity: the roller blinds are designed, providing reliable performance and ensuring their longevity. -Easy installation with the unique hook design: the roller blinds can be easily installed due to their unique hook design, making the installation process . -Secure and stable attachment, preventing detachment: the roller blinds are securely and stably attached, preventing them from detaching or falling off. -Flexible adjustment of roller blinds' lifting speed: the roller blinds allow for flexible adjustment of their lifting speed, providing convenience options for the users. Package list: 4 x roller shutter spring spare parts