CleanSpace pre-filter is suitable for use with the CleanSpace standard particulate P3 TM3 P SL R filter for protection against airborne particulate (dust, mists and fumes); the pre-filter is designed to remove course particles and enhance the life of the particulate P3 filter; the pre-filter should be changed after each use; important: when selecting a CleanSpace filter please consult a health and safety specialist for advice on the appropriate respiratory equipment and filter use; compatible with all CleanSpace PAPR power units; easy and quickly fitted and removed from the power unit; product weight 50 g; product dimensions 170 x 40 x 70 mm; sold in pack of 10 pre-filters