- Ideal for mixing test solutions in micro-titration assays and for use in hematology, urology, or EIA/ELISA immunology. Applicable for Alpha, Kline, Mazzini, Syphills, Pregnancy. - Textured non-slip rubber foam mixing pad holds various sizes of test tubes - Set sped from 75 – 250rpm. Also designed for fixed speed shaking at 130rpm - Operate continuously or set time for intermittent shaking up to 60 minutes - VRN-480 features 3 eccentric drive mechanism and counterbalance. Comes with 3-digit LED tachometer. Quiet and smooth operation. Speed readout helps improve the repeatability of your test procedures. The shaker platform rotates on six permanently lubricated, sealed ball bearings. The entire drive, housed in a precision machine, sits on four cushioned feet that prevent creeping.