Upgrade your office chair with this Heavy-Duty 18 Inch Office Chair Mechanism, designed for smooth height adjustment and tilt control. Made from durable metal with a black powder-coated finish, this replacement seat plate ensures long-lasting strength and reliability. The built-in tension control knob allows you to adjust the recline resistance, while the lever enables effortless height customization. Perfect for repairing or upgrading office chairs, executive chairs, and task chairs, this mechanism offers easy installation and universal compatibility with most chair bases. Key Features:::: ✔ Sturdy Metal Construction – High-strength steel for durability and stability. ✔ Height Adjustment Lever – Effortless seat height customization. ✔ Tilt Control & Tension Knob – Adjust reclining resistance for personalized comfort. ✔ Universal Fit – Compatible with most office chairs and task chairs. ✔ Easy Installation – Simple DIY setup with pre-drilled mounting holes. ✔ Powder-Coated Finish – Rust-resistant and long-lasting performance. Replace your worn-out chair mechanism and restore comfort and functionality with this premium-quality seat plate replacement.