These assemblies connect air supply hoses to the manifold and air source. Locking-type quick disconnects are available to interconnect lengths of air supply hose. With locking quick-disconnects, use up to 12 sections of hose to make up the maximum length. Established in 1914, MSA Safety Incorporated is the global leader in the development, manufacture and supply of safety products that protect people and facility infrastructures. Many MSA products integrate a combination of electronics, mechanical systems and advanced materials to protect users against hazardous or life-threatening situations. The company's comprehensive line of products is used by workers around the world in a broad range of markets, including the oil, gas and petrochemical industry, the fire service, the construction industry, mining, and the military. The company's core products include self-contained breathing apparatus, fixed gas and flame detection systems, portable gas detection instruments, industrial head protection, fire and rescue helmets, and fall protection devices.