... 4.anti-flaming,non-checking, 5.non formaldehyde. Description WPC square timber size length: design according to customers need. ... dust, timber fillings and recycled plastics to make WPC, so WPC is really recyclable product. There is no requirement ... additives. (Wood texture strong, resistant to abrasion, impact resistance, high-density, waterproof, moisture-proof, anti-termite, easy installation.etc.) ...