CONTAINERS HAVE PLASTIC HINGED LIDS THAT ARE PERMANENTLY ATTACHED INTERLOCKING SECURELY FOR STACKING. MOLDED FROM HIGH-DENSITY POLYETHYLENE CONTAINERS NEST WITH LIDS OPEN. HANDLES HAVE MOLDED-IN GRIPS. RUGGED DOLLY FEATURES A SOLID BLACK PLASTIC FRAME AND QUALITY NON-MARKING RUBBER SWIVEL CASTERS. USE INDOORS OR OUT WITH DISTRIBUTION CONTAINERS MEASURING 27-1/2"" X 16-3/4"" X 12-1/2"" OR WITH STRAIGHT WALLED OR FOLDING TRANSPORT CONTAINERS WITH A 24"" X 15"" FOOTPRINT. DOLLY MEASURES 27-1/2""L X 18""W X 3""H. 500 LB. CAPACITY.