55 Gallon 304 Stainless Steel Drum Dolly. Casters have a 304 stainless steel rig with 3" white polypropylene wheel and stainless steel hardware. Suitable for wash down. Stability Advantage - Casters are mounted past the dolly and drum rim. Our casters are mounted further apart than standard designs. The further the casters are apart, the greater the stability. 24" ID accommodates a standard 55 gallon drum.