... Test Sieve Shaker 1.with ultrasonic systems 2.low noise&Time control 3.Mode:Continuous and Interrpitten laboratory Test Sieve ... with light weight, small size, high efficiency, energy consumption, low noise, small timing control, convenient to move, etc.The standard set ... 20-800 mesh and 1-8layers for your choice.Advantages Less noise, light weight, small volume, timing control, convenient to move, ...