The unique design of the Globe Scientific GTRM-FS roller-mixer combines the operation of a vacuum tube roller with a see-saw rocking platform to allow for the ultimate in homogeneity of your blood/urine tubes and other sample types. This combined motion also helps ensure higher culture yields. The GTRM-FS is compatible for use in cold rooms and non-CO2 incubators. The rolling motion is a fixed 36rpm and the rocking motion is set at +/-11°.