... : HDF, brown / green core (3) Joint: Arc-click system, V-Groove, U-Groove (4) Formaldehyde Emission: E1 Standard, ≤1.5mg/L (5) Thickness ... , 1217*197*7/8/12mm, 808*146*12mm (V-groove), 808*130*12mm (U-groove), 1217*170*12mm,1215*196*8mm(7) Flooring ...