Features: Crafted from iron, this chair rotation base ensures long-term resilience and resistance to wear, perfect for maintaining chair durability. Features a convenient lift lever handle, allowing smooth height changes up to 100mm to meet various seating preferences and requirements. For office workers, home office users, and consumers needing a replacement chair base. Perfect for use in offices, home studies, and conference rooms, enhancing the comfort of your seating experience. Upgrading your seating with this chair component, ensuring your office chair remain secure and comfortable for extended periods. Specifications: Component:Iron Support 360 degree rotation Lifting range:100mm Size: 210x150x220MM Color: black Practicality: Suitable for the repair and replacement of various office chairs and bar chairs, providing comfortable lifting and rotating functions, enhancing the service life and flexibility of the chair. Package Includes: 1pcs Revolving Chair Base note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.