Chrisnik 3' Extension Arm for Pipe Mic

The Chrisnik 3' Extension Arm extends the reach of the Pipe-Mic for measuring larger diameter manholes where the standard 2' arm cannot reach. Designed for quick field changes, it easily replaces the standard arm by removing the shoulder bolt and snap pin, swapping in the 3' arm, and reinstalling the provided replacement snap pin.

Use the offset hole snap pin in either the “ZERO VERT. OFFSET” or “3’ ARM w/1’ VERT. OFFSET” position depending on the required setup.