Hose, HP helmet, 3/8" x 100 ft extn

A standard rubber hose could off-gas hydrocarbons which could be toxic to your health when used for a breathing air supply. 

A NIOSH-approved breathing air hose is made from specially-formulated materials to prevent toxic vapors from entering your respirator.

These hoses must only be used with the appropriate hood. Follow the links below and choose the parts for the hood you have.