It spins many sizes of test tubes and microtubes at speeds up to 5,000rpm (4,220g), with microprocessor speed control. The digital menu is simple-to-use, and the digital interface ensures accurate processing. The zero-rpm interlocking lid will stay locked until the rotor has come to a stop, to ensure safety. The all-metal rotors are built for strength and durability, and the wide-mouth metal bowl allows for easy cleaning. The whisper-quiet, heavy-duty, brushless DC motor can handle high volume use and high-speed full loads for years to come.