1. Outer cover: plastic shell (poly propylene,injection molded): Absorb sound;anti-aging; anti-impact;anti-UV; anti-fading.

2. Outer upholstery: Fabric,PU leather,Artificial leather or Real leather: Anti-abrasion; dirty proof; water proof; fire proof; anti-static. we have Chinese fabrics and European fabrics for client's choice.

3. Chair armrest: PU,Plastic or wood (beech wood,oak wood,Walnut wood.....solid wood).

4. Chair leg is made of cold-rolled 2.5mm thick steel tube with powder coating: anti rust. Chair leg can be fixed or movable. If fixed leg, the chair would be fixed on floor by 4 pcs of strong screws.If moveable leg, chair can be moved with wheels.

5. Inner material: Molded PU(polyurethane) foam and the foam density is: Seat foam: 55kgs/m3; backrest foam:45kgs/m3.

6. Inner structure: Metal frame or strong plywood.

7. Chair seat fold-up mechanism: seat tips up by metal spring or by gravity.