Description Made from durable and reliable material, it is built to withstand long-term use. Additionally, the spring hanging piece allows for flexible adjustment of the roller blinds' lifting speed, catering to different needs. with its external sunshade function, it effectively blocks sunlight and heat, keeping your indoor space cool and comfortable. Suitable for various roller blinds, it offers perfect light-blocking and sunshade effects while enhancing privacy. Features -Color:Silver -Material:Stainless steel -Size:20.00X10.00X0.70cm/7.86X3.93X0.28in - Stainless steel material is used for the roller blinds, ensuring durability and longevity. -The roller blinds are designed to provide reliable and long-lasting performance. -The installation process is made easy with the unique hook design of the accessories. -The attachment of the roller blinds is secure and stable, preventing any detachment or loosening. -The lifting speed of the roller blinds can be easily adjusted, allowing for flexible control. Package list: 4 x roller shutter spring spare parts