The Derrick Stack Sizer has redefined the concept of efficient, fine particle wet screening. Never before has one screening machine had such a high capacity in a minimal amount of floor space. Consisting of up to five individual screen decks positioned one above the other and operating in parallel, the Stack Sizer can be fitted with Derrick’s high capacity, long life, urethane screen surfaces. With this unique combination, fine wet screening becomes more practical than ever thought possible. Hundreds of Stack Sizers are currently operating at mineral processing plants worldwide and earning significant returns.