The Miller SAR 50 foot straight air hose is designed for the BreatheAir portable filtration systems that utilize 1/2 inch interchange fittings. This hose comes with a 1/2 inch ID (interior diameter) and is designed to fit Miller's portable BreatheAir panel or portable box.

This hose is not compatible with Miller's standard SAR systems which utilize a 1/4 inch interchange fitting. These systems would require the 270405 or 270407 straight hoses.