The Andela Trommel is designed to separate and size glass aggregate or cullet, and to sort out any material or trash that is larger than your target size. One or two screen sizes can be used in the trommels, allowing you to produce a sand type mix and a gravel type mix. The Andela Trommels come in several sizes to meet the needs of your individual systems and applications. The trommels are also ideally suited to other materials such as gypsum or co-mingled recycling.