Got a big aquarium setup or multiple tanks? This AQUANEAT valve set is a lifesaver for organizing and controlling your air supply. You get a whopping 120 pieces in the pack! These are 1-way (single) threaded gang valves. Basically, they let you split the air output from one single air pump into multiple lines, each going to a different aquarium ornament, sponge filter, or air stone. Each valve has a threaded connector for a secure fit on your airline tubing and an adjustment knob, so you can fine-tune or completely shut off the air flow to each individual line. This is crucial if you have items that need more or less bubbling than others. Made from durable plastic, they're easy to install and help you create a clean, customizable air distribution system. Perfect for serious hobbyists, fish stores, or anyone with a complex aquarium setup who wants precise control and to avoid running multiple pumps. An essential and super affordable piece of hardware for any advanced aquarist's toolkit.