Flip-up solution with a big (17 x 10 cm) curved, protective visor, increasing your peripherial vision. The Versaflo regulator V-500E is a balanced, belt-worn, easy-to-adjust regulator that consistently delivers the airflow level you set - from 170 l/min to 305 l/min. The airline supply must be air of breathable quality meeting the requirements of EN 12021. Oil mist, water vapour , or non-toxic, unpleasant odours in the air supply can be removed with an air cleaning station, such as the 3M™ Filtation Systems ACU-1 and ACU-2.