2-Piece Inline Duct Sound Absorption Tool, Foam (100mm/4") - Elastic Soundproofing Duct Accessories, Noise Reducers, Sound-Absorbing Foam, Black

[WHAT YOU GET]: This ventilation duct noise-reducing foam is specially designed for use in ventilation ducts and flexible hoses of fresh air ventilation systems to reduce noise, prevent dust buildup, and optimize ventilation performance. The soundproofing tools are made of high-density PU duct foam, offering high density and good elasticity. [WHEN/WHERE TO USE]: The inline duct fan absorbent foam effectively reduces airflow noise and vibration during ventilation system operation. It is suitable for HVAC systems, kitchen hoods, bathroom exhaust fans, tumble dryer exhaust ducts, and diesel heating ducts, as well as for use in homes, hotels, restaurants, shops, factories, and other locations.
[DESCRIPTION]: Outer diameter: 100 mm / 4 inches, Height: 80 mm / 3.15 inches, Suitable for a ventilation duct diameter of: 100 mm / 4 inches, Package contents: 2 Absorbent Duct Foam Pads.
[INSTRUCTIONS FOR USE]: First, remove the plug from the hole, then insert the absorbent foam into the air duct for a tight fit with the duct or air outlet.
[PRECAUTIONS]: Before use, ensure that the diameter of the ventilation system duct is suitable for the product. Before installation, turn off the power to the ventilation system and completely stop the fan before any handling.