The Tube Revolver can be used in a variety of laboratory fields such as molecular biology, biochemistry, clinical, and histochemistry. Five standard interchangeable rotisseries are included and designed to be used with a variety of tube sizes. Holding four rotisserie paddles at a time, this instrument can mix a combination of different tubes. Each paddle can be independently adjusted from 0-90 degrees. The fixed model Tube Revolver is programmed at a fixed speed of 25rpm and provides efficient mixing for your laboratory needs.