Origin	China
Model Number	831B
Type	Chair

Rear Back Panel : Rear back panel:one-pieced, high impact, injection molded polypropylene. 

Perforated seat panel: Injection molded polypropylene, more than 420 holes help for sound absorption. 

Paddingï¼Âš  Ergonomically sculpted backrest with horizontal stitching design,cold-foamed polyurethane(P.U.) for years of service  

Cushion: Roomy cushion design (25'' C/C) for maximum comfort,cold-foamed polyurethane for years of serviceï¼Âš

Fabric: heavy duty premium cloth, with CA117 fire retardant  

Armrest:  Injection Molded Polypropylene with cupholder

Lifting mechanism: Damping Spring driven for no sound.

Standard: 40x40mm Mold-pressed steel tube, electrostatic Powder  coating