This keg coupler adapter is perfect for bar owners, homebrewers, and anyone who wants to keep their beer lines clean. Use it when you're doing regular maintenance on your beer lines. Simply attach your D - style coupler, open the faucet, and start pumping the cleaning solution. It's easy to use and doesn't require you to remove the faucet. There are no specific size or weight details mentioned, but it's a small and handy accessory for your beer line cleaning needs.