Heavy Duty Office Chair Tilt Control mechanism allows back and forth tilting with adjustable tension. Features gas cylinder height adjustment and a twist wheel to tighten or loosen the backward tilt tension. Universal Fit: Designed to fit most office chairs, compatible with various mesh chairs, ergonomic office chairs, desk chairs, and task chairs. Ideal for replacement or upgrade. Premium Quality Replacement: Provides stable operation, smooth tilt control, and quiet performance. Enhances comfort and functionality of your office chair. Easy to Use: Adjust tilt tension with the twist wheel. Push the lever to enable tilting, pull out to lock in place. Single lever controls gas lift height adjustment. Function: Compatible with standard 28mm inner diameter tapered gas lift cylinders. Specifications: Material: Steel Style A: 27.8cm x 17.5cm / 10.94 inch x 6.89 inch Style B: 24.7cm x 17.5cm / 9.72 inch x 6.89 inch Package Includes: 1 Piece Office Chair Tilt Control Mechanism Note: Slight measurement variations may occur due to manual measurement and display differences.