ANALOG TUBE ROLLER, 13.5 IN, 0-70 RPM, 100-220 V, 50/60 HZ. The MX-T6-S Tube Roller provides a gentle but highly efficient rocking and rolling motion, ideal for mixing blood samples, viscous substances and liquid-solid suspensions. Used in a variety of applications, prevention of blood coagulation and immune precipitation etc. The MX-T6-S can roll 15 x 50ml centrifuge tubes or 10 x 15ml centrifuge tubes.