The Vestil PCS-1626 plastic interlocking dolly has a plastic frame, interlocking edges, hand holes, and four caster wheels,The caster wheels measure 1 inch wide and 4 inches in diameter, and are made of polypropylene, which is resistant to water, impacts, and abrasions and won't mark floors.This dolly has a load capacity of 250 lb., weighs 10 lb., and measures 6-1/2 x 16 X 26 inches (H x W x D). (H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.)