Features: These aluminum window rollers are designs for smooth sliding and performances on door and window. Upgrades your door or window system with these high-quality aluminum sliding wheel rollers, ensuring easy operation. Produced of steel/nylon, these window pulleys provide reliable support and stability for easy opening and closing. Enhances the functionality of your sliding door and window with these aluminum Glides rollers, build for long-lasting use. Experience improved efficiency and convenience with these aluminum push-pull window rollers, Suitable for various door and window applications. Specifications: Material: steel+nylon Size: about 1.96x2.7x7.6cm Type: 2 type for option Package Includes: 1xSliding Door Rollers note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.