Set includes cake board which is thicker and stronger than usual. 6 inch bakery boxes with window are ideal for cookies, treats, pastry, cake, dessert, donuts, Chocoloate, etc. It is made from BPA Free sturdy, high grammage, eco-friendly paperboard and biodegradable window film. Assembly is quick and easy. The shape of window is various. You could let us know if you have your own shape. With an imprint of your logo on it, it will certainly stand out from the crowd!