1. Double back chair 2. SGS/BIFMA gaslift 3. 5 years ... • Product Features MaterialspongeOther material availableseat fabric back mesh,all fabric,seat leather back mesh,all leatherHeadrestheight adjustmentFrame colorblackBackrestheight adjustament, angle lockLumbar ... 168pcs/40GPColor availableblack,red,orange,blue,green,grey Blue color double back high back office chair-very comfortable to use [DB01]