Norwood Commercial Furniture Heavy-Duty Stack Chair Dolly, Black, NOR-TY-701-DY Easily transports up to 12 Norwood stack chairs Hefty rubber casters helps with safely moving chairs from room to room and over door thresholds. The heavy-duty steel construction features a powder-coat finish to resist scratching. Exterior base dimensions- 23" W x 23" D x 1" H & interior base dimensions-15 1/4" W x 15 1/4" D x 1" H