Benz - SJA159-KT 1. Adjustable 3D headrest + 3D armrest 2. Nylon + GF lifted Backframe + Adjustable lumbar support + Coat hanger 3. Full mesh design + Seatslidable + Footrest 4. Functional wire-controlled mechanism 5. Class 4 gaslift 6. Aluminum base can be passed 1136KG static pressure test 7. PU castors BIFMA test passed