High back with headrest
1) light grey frame, 360° 6D adjustable gaming armrests, 
2) 135+10° self-weight-adjusted wire mechanism,4 position locked ,with seat slider
3) waist-fit lumbar support ,
4) liftable backrest,
5) #85D80 Korea KGS class 4 gaslift,
6) light grey nylon base & Φ60 PU casters.