Can-Filters 125mm SilencerCan Filters 125mm Silencer This Silencer by Can Filters makes the irritating noise of extractor fans a thing of the past. Made from steel to ensure sturdiness, this silencer has a pierced internal surface which allows the air and noises to be suppressed after passing through the fan. If you have had to watch your plants suffer without an extraction unit because you have been worried about the noise, then this silencer will be a game changer for you.