1, four can be inserted, easy to operate; 2, both with each other for stacking in the warehouse, but also suitable for use in all kinds of shelves; 3, suitable for all kinds of truck transportation, convenient materials assembled, units of the transport; 4. convenient forklift, hydraulic pallet trucks and other handling tools for the job; 5, with non-slip rubber to ensure that the material in the handling and transportation process will not fall; 6, long life, and then follow the bad; 7, plastic tray with safety, sanitation, pest control moth, no repairs.