Pre-Filter Holder The Pre-Filter Holder securely attaches Corpro pre-filters to compatible Corpro main filters, helping extend filter life and improve particulate protection. Its durable low-profile design makes installation quick and easy for reusable respirator systems. Key Features Securely holds Corpro pre-filters in place Compatible with all Corpro main filters Robust low-profile design Quick and easy to attach Helps extend the life of main filters Suitable for reusable half face and full face respirators Compatible With R1400 Half Face Respirator R1600 Full Face Respirator Corpro Main Filters Suitable For Construction Mining Manufacturing Chemical handling Spray painting Dust and particulate protection General industrial applications