The Ohaus 83041040 2-Pack of Rotor Racks is an accessory for use with the Frontier 5000 Angle Rotor and Frontier 5000 Series Multi Pro Centrifuge. The multi-purpose centrifuges can be customized to fit workflow needs using a wide variety of rotors and accessories. The intuitive design enables easy access to parameter settings and quick rotations between applications. Maximize sample preparation for numerous laboratory applications. Each rack can accommodate 24 Microtube test tubes for a maximum of 96 tubes per full rotor.