Blood Roller Mixer Features: Roller Size: 4Nos. X230mm Lg. Main Input: 230 V. 50Hz- 110 V, 60 Hz, AC RPM: 30 RPM/36 RPM Mixing Time: 15 To 20 Minutes Weight: 3.0 Kg. Capacity: Non-Vacutainer 9 Nos. (of -4ml) Of Bulb of 5ml X 15 Nos.