This ASN-8 air silencer is a good value in terms of performance versus price, is very compact, and does what it's supposed to do: reduce the noise level of air venting from a compressed air system. I use this silencer on the air bleed valve on my small shop air compressor. Before I installed the this silencer, each time I needed to service my air compressor I had to put up with the very loud and annoying screech of venting high pressure air when I opened the bleed valve. The noise was so bad that I had to leave the room. After installing the ASN-8, the noise is greatly reduced and can now remain in my shop while the air is venting. While air venting through the silencer still makes considerable noise, it is much quieter than before and I'm sure that it's much safer for my ears -- it's no longer painful to be near the bleed valve when its venting. I'm very pleased with it for my application. Note that this model is very small and therefore has a limited flow. As such the ASN-8 is probably not suitable to vent a really large or very high pressure compressed air system. My shop compressor is set for 125 psi and only has a 60 gallon tank and the ASN-8 seems to be a good fit for a modest sized air system like mine.