School Study Mesh Ergonomic Computer Desk Office Chair Without Headrest. Ergonomic Design: Features butterfly mechanism with lifting, revolving, tilting, and single locking functions. Durable Construction: PP + glassfibre frame and base passed 1136KG static pressure test. Quality Components: Gas lift passed BIFMA test; 5-year warranty on castor, base, and gas lift. Customizable Options: Customized service available for frame, seat, base, and mechanism specifications. Flexible Ordering: No MOQ for first order; mixed models allowed in one container for subsequent orders. Sample Policy: Sample cost and postage refunded upon placing a 40HQ container order. Fast Production: Production time takes around 5 to 15 days to finish all orders.