The Scranton the shell-shaped back which includes a reclining locking mechanism with tension control, and the ergonomic mesh seat provide the best seating experience. The structure delicately cradles the curves of your spine with integrated lumbar support, whereas the durable aluminum base rotates for ease of use with effortless mobility. The chair supports weights up to 285 lbs. and is BIFMA Certified.Features :- The pneumatic height adjustable- Tilt locking back reclining mechanism- Tilt tension control mechanism- Seat + back made of breathable elastic plastic mesh- 3D padded arms- Heavy-duty aluminum base with dual casters- 2-year limited warranty- Ships in 1 box.Specifications :- Chair Dimensions : 28"W x 17.5"D x 23"H- Chair Weight : 46 lbs- Chair Weight Capacity : 285 lbs- Seat height minimum floor to seat top : 17.5"- Seat height maximum floor to seat top : 23".