Compatible with all RZ Industries« mask models Two one-way Exhalation Valves per package (each includes valve and base) One-way vents expel condensation and keep the inside of the mask dry Optimize airflow for easy breathing at all times Easy twist seals lock filters in place and block unfiltered air 1.5 diameter in size Sold in pairs Replacement exhalation valves and caps cannot be used with NIOSH approved respirators.. VALVE V2 REP EXH 2.0 BLU
