NRC XL-B Pneumatic Isolation Mount 16 inch

This is a used Newport Research Corp XL-B Pneumatic Isolation Mount.

Optical table tops at https://testing.bmisurplus.com/product-category/optical-equipment/optical-tables-breadboards/
From manufacture website: Pneumatic isolators are one of the best methods of vibration isolation for critical applications. When properly designed and carefully constructed, their performance combines the “fast roll-off” of the Simple Harmonic Oscillator at vibration frequencies above resonance with the “low amplification at resonance” of the damped harmonic oscillator near resonance.
External Air Supply Required May require shipping upright.
Specifications:
– Height: 16″.
***MPN XL-B
***OEM Newport Research Corp (NRC)
***SKU*** 21247