... product at the present market . Structure:Bottom is 0.5 cm or 0.9 cm of plywood, the middle is ... a sponge, a thickness of 1 cm, 3 cm, 5 cm, 8 cm sponges to choose from, the outermost ... high-end furniture, sponge, good elasticity, density is 1.5 times the normal sponge, prices are much more expensive than ... board Board on the market are used in the MDF base, 5 shelves, we use a high-quality 5MM thick MDF, ...