Pre-Filter (5 Pairs) The Pre-Filter helps protect Corpro main filters from airborne particulates, extending filter life and improving respirator performance. Designed for use with compatible Corpro respirators, these pre-filters are quick to install and ideal for dusty industrial environments. Key Features Reduces particulates reaching the main filter Helps extend the life of compatible main filters Quick and easy to install Fits securely into the Corpro Pre-Filter Holder Suitable for half face and full face respirators Supplied as 5 pairs (10 pre-filters) Compatible With R1400 Half Face Respirator R1600 Full Face Respirator R11112 Pre-Filter Holder Corpro Main Filters Suitable For Construction Mining Manufacturing Sanding and grinding Dust and particulate protection General industrial applications