Haining Royal Plastic is one of the leading fashion and decorative ps ceiling cornice manufacturers and suppliers in China,Website: , providing with high-quality ps ceiling cornice building material, welcome to buy ps ceiling cornice from our factory.XPS Polystyrene Cornices are manufactured out of higher density polystyrene and has a smooth finish comparable to any other cornice on the market.Due to the high density polystyrene used it is stronger and more durable than EPS cornices. If the best is what you are looking for, then XPS polystyrene cornices are for you. XPS is rigid, high density, extruded polystyrene, with a smooth finish.