School Desk Chair Swivel Classroom Hall Meeting Computer Study Conference Office Chair. Customizable Frame and Seat: Frame made of PP + Glassfibre; Seat uses 42kg/M3 density cutting foam. Durable Butterfly Mechanism: Features lifting, revolving, tilting, and single locking functions. BIFMA Certified Gas Lift: 80# Level III black gas lift passed BIFMA safety test. High Load Capacity Base: 320 mm PP base passed 1136KG static pressure test. Ergonomic Mesh Design: Hoau Brother mesh back with fixed lumbar support for comfort. Comprehensive Warranty: 2-3 years guarantee for product; 5 years for castor, base, and gas lift. Flexible MOQ Policy: No MOQ for first order; 20 units MOQ for subsequent orders. Sample Cost Refund: Sample cost and postage refunded upon receiving 40HQ container order.