The SD4EMI Panduct PanelMax Noise Shield Kit reduces EMI/RFI noise between wiring for up to 20dB reduction in noise, or 90% NVR (equivalent to 6" of air spacing). Installs easily within Panduit wiring duct or when mounted separately. Segmented design for cutting into shorter sections. Designed for 4" high wiring duct. Zinc-Plated Steel. Kit includes two 3-foot sections, bonding clips, and anti-oxidizing paste. Color Black. 1 per package.