2x Hydroponic Acoustic Fan Silencer Fox Silencers 100mm / 4″ Inch x 1m Long (other sizes available please check our other items for sale) Double Wall Thickness – 50mm Insulation Silencers are applied for noise absorption during the operation of the fan. The silencer is attached to the fan to reduce the noise level in the air duct. The Fox Silencer is made of micro-perforated aluminium foil and laminated with polyether film. Reinforced steel wire and outer polyethylene sleeve makes the fox silencer more durable Please see our shop for more hydroponic / ventilation products! Free 1st Class Delivery!
Features: Two 4″ flanged ends. Portable and light weight. Safe and effective operation. Easy to install and maintenance free. Highquality corrosion resistant galvanized sheet construction. Wave crest polyurethane sponge can offer excellent sound and vibration absorption. This highperformance sound absorbing foam lining can reduce 50% noise! If the noise of your fan/blower is 50db, our muffler can reduce it to 25db. Moisture resistant great for use in damp environment. Extended collar and lip for easy duct hookup. Air tight sealing tape pasted on the muffler Specification: Flange 4″ Fit for Fans/Blowers 4″ Flange Surface Material Durable Galvanized Sheet Sound Absorbing Foam Wave Crest Polyurethane Sponge Fusion Point of Foam 250 degree centigrade The Influence to Hearing of Different Decibel: Decibel Sense of Hearing 020db Very quiet, hardly feel 2040db Quiet, like soft voice 4060db General, like common talk indoor 6070db Noisy, bad for nerve 7090db Very noisy, nerve cells