... controled within 12%2.no scar exists in the frame;3.frame is surfaced well,no rind exists.Elastic:1. ... feel comfortable.Surface material: selected natural aniline leather, vatica astrotricha Frame: solid wood,MDF Leg: solid wood, metal. Elastic fittings ... : S shape spring, natural rubber bandage. Chair seat, back seat and chair arm: long range elasticity polyurethane, natural emulsion, ...