ChrisNik Pipe-Mic II Pipe Invert Measurement Tool The ChrisNik Pipe-Mic II is a specialized survey accessory designed to measure pipe inverts and pipe diameters quickly and accurately . The tool mounts directly to a compatible grade rod, allowing measurements to be taken using a vertical plumb rod for improved accuracy . Constructed from lightweight non-rusting aircraft-grade aluminum , the Pipe-Mic II attaches in seconds and provides fast, reliable pipe measurements in manholes, storm drains, and utility structures. Key Features • Measures pipe inverts and pipe diameters quickly and accurately • Uses a vertical plumb rod method for improved measurement accuracy • Lightweight aircraft-grade aluminum construction (approx. 2 lb) • Tool-free attachment to compatible grade rods • Round measuring foot ensures accurate pipe contact • Adjustable 0 or 1-ft vertical offset for clearance under the rod Ideal For Utility survey, manhole inspection, pipe invert measurements, and storm or sanitary sewer surveys .