These replacement MSA breathing hoses provide clean and pressurised air to the user from the OptimAir 3000 series respirators in a secure manner. The hoses fit the respirators and the face piece securely to ensure the safety of the user. There is a selection of hoses available to fit the face piece in use securely and correctly. Features and Benefits The hoses securely fit the respirators and the mask/hood to ensure the safety of the user is maintained Selection of hose for OptimAir masks, OptiTop, or OptiHoods and OptiVizors *Images are for illustration purposes only*