Authentic product. Since it has not been washed, please wash it before use. There are scuffs, scratches, and stains from use. Please understand that some blocks may have slight discoloration due to being white. Please purchase with the understanding that this is a used item. Due to the thickness, it will be sent in simple packaging. I am also listing other LEGO items. If they can be combined for shipping, I will discount the shipping cost. Details are in my profile. LEGO Duplo Base plate Base Foundation plate Base Thin plate Thin block Block Studs 12x6 6x12 4x8 2x4 Half circle Curve