Uses: This type of splitter allows multiple grass tanks to share a CO2 cylinder set. Easy setup, no modification required to your CO2 regulator. With this splitter, you can easily connect up to 5/6 diffusers/supplies from a single CO2 cylinder. Each outlet is equipped with an individual needle valve allowing precise regulation of CO2 flow. Made from Metal, the solid constructions ensure long-lasting durability and dependability.