This Kit is designed to make your instant crystal clear beer or cider. The filter Kit gets installed inline between two ball lock Cornelius kegs using CO2 pressure to push the beer out of the full keg through the filter and into the clean keg. We use the filtering kit find that they; keg beer, chill it overnight, filter the next day, carbonate, and are drinking clear beer in a couple days. includes the 10 inch transparent filter housing and also the 1 micron absolute rating filter cartridge. With the bronze barb/ball valve, you can control the speed of the beer/cider in the filtration process. The filter/cartridge is washable/ reusable. Soak the filter in napi-san and rinse thoroughly. The lid comes with the pressure relief button.