The SD4EMI is a Panduct® panelmax™ metal divider wall EMI Noise Shield Kit made of gal annealed steel with black powdered coating comes with zinc-plated base. This noise shield features metal noise barrier reduces EMI/RFI noise between sensitive and noisy wiring for up to 20dB reduction in noise or 90% NVR (equivalent to 6-inch of air spacing). Innovative design installs easily within Panduit wiring duct or when mounted separately. Perforated sections speed installation by allowing sections of the shield to be snapped off at intervals to easily size shield to length with minimal deburring. Vertical wall slots allow wires to cross the barrier at 90° when necessary, providing greater design flexibility. Horizontal cable tie slots allow wire bundles to be held in place using cable ties to optimize cable management and aesthetics. Compatible with standard 4-inch height wiring duct.