The Nakajima fire fighting coupling, made from durable aluminum material, is designed for quick and secure connection between firefighting hoses and equipment. With a diameter of 2 1/2" (65mm), this coupling is compatible with standard firefighting systems, providing reliable performance during emergency situations. The aluminum construction offers a lightweight yet strong solution, ensuring resistance to corrosion while maintaining high performance in demanding environments. Ideal for use in firefighting operations, this coupling ensures safe and efficient water flow.