Back: Nylon + fiberglass frame, Korean mesh
Lumber support: Adjust by the Up & Down sliding Rod
Armrest: Fixed pu loop arms
Cushion: Californian fireproof high-density moulded foam, no plywood, no gun nail, no glue, fixed by nylon line. 
Mechanism: Aluminium alloy one moulding die casting, with 3 degree locking system. Korean Class 4 KGS gas lift
Gas Lift: Class 4 Gas Korean shaft (Samhongsa Korean branded heavy duty gas shaft)
Base: High quality 350mm five star nylon feet
Castors: 60mm PU wheel (black
Rating: 5 year warranty & 150kg weight rated