Crafted from excellent metal, this rolling door hardware set includes a pulley wheel and fixed pulleys, making it proper for various rolling door applications. The sturdy construction ensures performance, while the precise engineering ensure seamless movement, reducing wear and tear on your door mechanisms. Features -Color:Silver -Material:Iron -Size:23.00X23.00X4.00cm/9.04X9.04X1.57in -Central hole diameter: 3.5 cm. -Exterior diameter: 23 cm. -Smooth operation: provides consistent and smooth operation for rolling doors, ensuring handy usage every time -Efficient bearing system: features an efficient bearing system that facilitates easy and smooth door movements, enhancing overall functionality -User-friendly installation: the installation process is straightforward and user-friendly, allowing for quick setup without the need for tools -excellent construction: made with materials, this product is built to withstand frequent use and harsh conditions, ensuring longevity -Wide application: ideal for both commercial and residential rolling doors, offering a practical solution for various settings Package list: 1 x wheel