Features: The panel is made of high-precision marble, which is practical, beautiful and wear-resistant after fine grinding The vibration isolation support is made of composite materials, solid damping and vibration isolation, and the structure is stable and reliable, which is suitable for experimental places with good environmental vibration The adjustment support part adopts wear-resistant screw and plane thrust ball bearing, which is easy and reliable to use Flatness: double zero level Surface roughness: < 0.08 μ m INTERNAL FREQUENCY: Vertical 2.0 Hz ~ 3.0 Hz Amplitude: < 1.5 μ m