1888 Press Release - New Low-Height, Low-Frequency Vibration Isolation Platform Adapts to Space Constraints in Critical Micro- and Nano-Microscopy. At just 2-1/4 inches in height, while isolating vibrations as low as 1 hertz, the new completely-passive Negative-Stiffness tabletop vibration isolation platform – developed by Minus K Technology – provides the industry’s thinnest low-height, low-frequency isolator for optimizing space in critical microscopy and laboratory applications.