Fluid couplings are indispensable in providing connections in systems that involve the flow of air, water, oil or gas. Nitto Kohki couplings are distinguished by their high quality and durability. Their safe, easy one-hand connection and disconnection enables superior operability. Their built in automatic open and shut valve provides high flow, easy flow control and realizes a perfect seal. To meet diverse needs for couplings for applications in the home as well as in the medical, biotechnology, nuclear, semiconductor and computer fields, Nitto Kohki offers a full product line-up comprising of 3,000 series and 25,000 individual models.