Features: Upgrades your office chair with our Heavy Duty Office Chair Tilt Base, designed for durability and long term use, ensuring a stable and comfortable seating experience. Crafted from high strength steel, this tilt base features a 3.94x3.94inch/5.51x5.51inch mounting hole pattern, allowing easy height adjustment and backward inclination tension control with a simple handwheel twist. Ideal for office workers, home office users, and anyone needing to replace their chair's tilt mechanism, providing reliable support for daily activities. Perfect for various setting such as offices, home study rooms, or any workspaces requiring dependable chair support, enhancing both comfort and productivity. Ensure compatibility by checking bolt pattern and dimension before purchase, and enjoy the peace mind that comes with robusts and versatilitys office chair component. Specifications: Component:Iron Option Type:Round Plate,Square Plate; Round Plate Size:Approx.10x10cm/3.94x3.94inch Square Plate Size:Approx.14x14cm/5.51x5.51inch Package Includes: 2pcs Chair Tilt Base note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.