OM5 - Office Master Ergonomic Self Weighing Mid Back Task Chair

The Office Master OM5 Evolved builds on the original OM5 with enhanced comfort and flexibility. It still features the signature self-weighing mechanism that adapts to a wide range of users without manual tension adjustments. New upgrades include a bi-lateral lumbar system for personalized back support, a tool-free removable seat for easy replacement, and 2.5 inches of seat depth adjustment. The OM5 Evolved delivers dynamic support, long-term comfort, and sleek style—at a price that’s hard to beat. Features: 21" Mid Back Polyflex Body-Activated Motion mechanism Polyflex with variable back resistance Virtual pause/lock Tilt Lock Field Replaceable Seat 350 lbs. Weight Capacity Seat Depth Adjustment Lifetime Limited Warranty Specifications: Model/Sku Office Master OM5 Overall Width 28″ Overall Height 37-42″ Back 18"w x 21"h Seat 19.5″w x 17.5-19.75″d Seat Height 16-21" Carton Weight 64 pounds Warranty Lifetime Limited Chair measurements are approximate and are based on