1 Density: 830 860 880 900 more than 900 2 Core: Brown White Green 3 Click: Single-Click Double-Click Arc-Click 4 Size:/mm 1215x195 1215x125 805x125 5 Thickness:/mm x7 x8 x12 6 Wearing surface: AC1 AC2 AC3 AC4 Ac5 7 Formaldehyde 8 Normal surface: Melamine-surface 9 Piano-lacquer surface: Piano-lacquer surface 10 Surface-style:Crystal Surface, Embossed Surface, Piano lacquer Surface, PearlSurface, Solid Wooden grain, hand-scratch Surface, etc. Or as per yourrequirements. 11V-groove Model Press Model , it is much more better than the normal v-groove and looks more beautiful and natural......... 12 water-proof layer water-proof layer 13 noise-proof layer noise-proof layer 14 Any other questions pls feel free to contact me.