Builder's Best WMF621 Foil Duct UL181 Size:4" x 50' apart to prevent small items

apart to prevent small items from falling through the wires or falling over on the shelf

and a ground

Polypropylene Fiber

Comfortable pistol grip

Listed per UL Standard 719

Builder's Best WMF621 Foil Duct UL181 Size:4" x 50' apart to prevent small itemsWire helix multi ply foil duct designed for low to medium operating pressures in HVAC systems Class 1 Air Connector label meeting NFPA (90A and 90B). Tear and Puncture Resistant Encapsulated wire helix does not unravel when cut to length Air tight construction and smooth inner core Steel Wire Support Note: Not for use to vent appliances for cooking, heating, and clothes drying unless approved and recommended by the appliance manufacturer PRODUCT