AllPoints Foodservice Parts & Supplies 1771062 casters feature a square swivel stem design, measuring 5 inches in height. Each set of four casters supports a robust load capacity of 580 lbs, making them ideal for heavy-duty applications. Constructed from durable black rubber, these casters provide smooth mobility and protect flooring surfaces. They come complete with mounting screws and nuts for easy installation on wire shelf carts with square posts.