The STD4 can come in a variety of features and configurations. Whenever a large amount of goods, such as linen and waste need to be transported, this unit offers the solution. The roll containers and boxes it comes with are available with a steel or plastic base. The sturdy build, which includes a tubular frame and steel coating, allows for the STD4 to be used outdoors as well as indoors. Some models come with 3 lateral sides, and some with 4. The weight capacity is 500 kg (1,102 lbs).