3M Supplied Air Hoses are NIOSH-approved breathing grade hose with a special liner to prevent hazards like flaking and degradation.
They are extremely kink resistant.
They are also resistant to absorption of tastes and odors from chemicals in the local environment.

Sections are equipped with male NPT fittings at both ends; these accept female NPT fittings
High pressure hose (blue) is typically used with high pressure compressors producing pressures in the 100 psi range (max. pressure is 125 psi); lengths of 25 or 50 feet may not be combined, but 100 foot lengths of high pressure hose have beeen certified for, and may be combined, up to a maximum of 300 feet (3 sections)
By comparison, low pressure hose (red) is typically used with air pumps producing pressures in the 17 psi range
Note - female NPT fittings shown in the image are for illustration only, and are sold separately