The Ventrac SS300 salt spreader is for winter services, and is designed to spread bagged rock salt and calcium flake. It features a 3 cubic foot capacity. An electronic control box comes standard and features an electronic speed control and On/Off switch An optional Drop Curtain is available for spreading material in tight quarters such as sidewalks, parking garages and more. The SS300 fits both the 3000 and 4000 series tractors.