2440*1220 mm ,with 12,15,20,25mm thick 1.FeatureThis product is light-weight, eco-friendly,late-model acoustic ... panel .2.Main performance 1) Firm structure : solid structure , full of elasticity, impact resistance, ... up to the equirement of GB8624B1. Formaldehyde emission is 0.1 E1 class. 3. Specification 1200x600mm, 2400x1200mm Thickness : 15mm, 20mm, 25mm ...