... : 52-5/16 * 19-3/4" * 36-11/16"2,Loading Qty of one 40' container:360pcs3,Heavy duty steel struction4,Large strong ... PU casters,2pcs 3"*1" casters,and 2 pcs 3"*1" rigid casters5,Material ... : steel sheet, steel tube6,Surface:powder coated Heavy duty flat cart