Mastery Mart Office Chair, Heavy Duty Task Chair, Mesh Mid Back for Back Support for Office, Task, Desk, and Computer (with T-Armrests) GREAT SEATING EXPERIENCE - Proudly sold and made by Mastery Mart. Comfortable chair with unbelievable seating experience. 2 Inches thick padded seat for One-day Long Comfort. Black Mesh provides the breath-ability for your back. SMOOTH AND SAFE MOVE - Mastery Mart's Smooth Rolling Casters with Steel Chrome Base. Pneumatic Seat Height Adjustment. EASY INSTALLATION - 15 to 30 Minutes in Average Took by Our Customers. Easy Installation with Clear User Manual. STURDY AND GREAT PERFORMANCE - 250 LBs Maximum Weight Capacity. Seating height: 49 to 60 cm, or 20" to 24" 100% SATISFACTION GUARANTEED - If you don't absolutely love your Mastery Mart Chair, we guarantee you that we will reimburse you for 100% of your order.