... to visit our factory. 18mm birch plywooda) low formaldehyde emission,b) use the high quality materials and superior quality appearancec) use ... : MR, Melamine, E2, E1, WBP 4) Grade: B/B, BB/BB, BB/CC, BB/CC, UTY Grade 5) Core: Poplar, Hardwood, Pine Birch etc ...