Quality Material: This chair back is made of high-strength plastic to ensure stability and durability, and is not easy to deform Ergonomic Curvature: The office chair backrest frame design fits the curve of the human spine, effectively supports the waist, and improves comfort during long work or meetings Compatibility: This conference chair back panel is suitable for various types of chairs, including swivel chairs, conference chairs, computer chairs, and office chairs, and can flexibly adapt to different seating needs Easy to Install and Replace: The computer chair back frame is easy to install and quick to replace, making it easy to renew your old chair Dimensions: Office chair backrest frame measures 530x450 mm, offering a balanced fit without bulkiness Specification: Material: Plastic Size Chart: 53 cm x 45 cm / 20.87 inch x 17.72 inch Package Includes: 1 Office Chair Backrest Frame Note: Please allow slight errors of 1-2 cm / 0.39-0.79 inch due to manual measurement.