This added protection feature means that your products can remain completely sealed and protected during transit. Like a rigid box, when assembled the boxes can be stacked with or without lids. FREE Delivery by Amazon. Industrial Plastic Pallet，Collapsible Plastic Pallet Box - Enlightening Pallet Enlightening has 60 sets of injection machines for industrial plastic pallet, with different sizes and capacities - up to 4000 TON. Sides and floors may be solid, slatted, wire mesh, or a combination of solid bottoms and open sides.