This powerful centrifuge, with all-metal housing, spins up to 24 microhematocrit tubes at 12,000 rpm. Tubes are held in place with a screw-down metal lid and replaceable rubber gasket/ring. The 5-minute mechanical timer has a bell tone to signal a completed run, while the electronic brake can stop the unit on demand. Metal lid features a safety-lid latch that cuts engine power if lid is lifted. Unit comes complete with a metal hematocrit reader tray.