The Pre-filter for Canister Filters is available in a pack of 50 pieces, providing an ample supply for prolonged use. These pre-filters serve as a crucial component in enhancing the effectiveness of canister filters by capturing larger particles before they reach the main filter. Designed for convenience and durability, this pack ensures an extended lifespan for canister filters, contributing to an efficient and reliable respiratory protection system. Ideal for professionals requiring a comprehensive solution for sustained usage in various environments. Features and Benefits Designed for durability and convenience Ensures that larger particles are caught before they reach the main filter Pack comes with 50 pre-filters