The MojoSort? Magnet allows the separation of magnetically labeled cells. It accommodates 12 x 75 mm (5 mL) round bottom tubes. The magnetic field generated inside the device is sufficient for the isolation of up to 2 x 108 cells and can fit up to 3.5 mL of cell suspension.Warning: Pacemaker wearers must stay away at least 12 inches (30 centimeters) from the device. Keep away from computers, tools, and other objects that respond to magnetic fields.