1.Sponge:High density elasticity foam, D32-36 for cushions,D26-28for back&ar mrest, or noted for its coziness and long durability
2.UK BS5852 and USA CA117 fireproof foam are available
3.Frame:Dried solid wood frame, undergone anti-worm and polish treatment.
Humidity control between 12 - 15%, meet the exported standard
4.Spring:Strong density & non-sag spring, 2 springs' distance less than 18cm
5.Gluewater:Certificated to keep the body safe
6.Other marerials needed ,please contact us checking the price.