Features: S-shaped pulley curtain access, easy to installs and operate, providing a smooth curtain pulling experience. effectively reduce the friction noise of curtains; for various types of curtains. for curtains, such as home, office, hotel., they easily operated by elderly people, adults, and children. It widely used in various window such as bedrooms, living room, offices, providing users with better privacy protections and light control. curtain track S hook is convenient solution for hangings curtains on various types of window. Specifications: Materials: Plastic Quantity: 1Set, 2Set (optional) Package Includes: 1/2Set Curtain Track Glider Hook note: Please allow 1-3mm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item.