Constructed of heavy-duty galvanized steel, the Champion Sports 50lb Capacity Pro Line Marker offers a one-piece cast aluminum rotor housing that makes it one of the most durable on the market. The distinctive agitator allows material to flow freely and prevents caking. The fingertip control has an instant shutoff, and the flow gate and level stop give you infinite control and precision. This line marker features four 10” diamond tread rubber tires, and creates either a 2” or 4” line.