It can help the blood fully mixed in anticoagulant bottle (tube) which is suitable for dried powder and freeze dried agent mixing as well as liquid mixing in sealed bottle (tube). The machine has a reasonable vibrating range and an inter zone crashing range that is adjustable. Maximum R.P.M. 30 to 36.Roller Size-4 Nos x 230mm Length.Mixing Time 15 to 20 mintues