watch out for these. where the product is as advertised, i had a problem the first time i used one. I dry hopped with three ounces in a keg of IPA and when i went to serve it, the dip tube became clogged. It turns out the lid of the filter tube (the part the screws on) came off!! After trying to salvage the beer i managed to rack to another keg, but i fear the beer is too oxidized and may have to be dumped. when i pulled the filter out and cleaned it out, it seems the lid, even when screwed on properly, will just pull right off. I recommend, placing the keg in position where it will be served before putting the filter in to minimize any jostling of the filter.