Virtually indestructible LLDPE polyethylene plastic constructionUnbreakable molded-in handles on base for lifting and loadingAluminum extrusion handles for lid removalHeavy-duty 3" casters with rubber wheels; includes two swivel casters with brakes and two fixed casters for control and steeringHeavy-duty 1.5" nylon web straps and YKK buckles secure lid to baseMolded end supports with foam lining protect screen from shockIntegrated "UP" arrows notify shippers to keep upright during transportFoam inserts to customize fitAvailable in a variety of colorsMade in the USA from recycled materialBuilt-in dry erase white board to label contents