Large Open Air Shakers Designed To Uniformly Shake Hundreds Of Samples, Day-in & Day-out, Under The Extreme Conditions Of An Environmental Room. New Engineering Concepts In Load Balancing Minimize Stress & Vibrations, Even When Fully Loaded & Running At The Maximum Speed. Accept S Hundreds Of Samples On Up To 2 Accessory Platforms. As Pictured, Platforms Have Easy Access To All Glassware, & Lock In Place Without Tools. Maintenance Free, The Coated Tray Is Proof Against Aggressive Liquids. A Powerful, Quiet, Reliable, Either For Gentle Shaking Of Liquids Or Vigorous Mixing Of Materials. Optional: Digital Speed Contro