The Festool HF-CT SYS Main CTL Dust Extractor filter is a replacement main filter designed to maintain the extraction performance of compatible Festool CT dust extractors during both fine dust and coarse dirt removal tasks. Constructed from cellulose fibre material, this flat fluted filter captures residual dust that passes through the filter bag, ensuring that the air returned to the working environment is clean. With a restraint value of 99.9%, it provides reliable filtration for dust classes L and M, making it suitable for use across a range of trade and industrial applications. The filter is compatible with the extraction of mineral and household dusts as well as wood dusts, making it a practical choice for carpenters, joiners, and general contractors working in environments where dust management and compliance with health and safety requirements are essential. Features and Benefits:Cellulose fibre construction suitable for fine dust and coarse dirt extractionFilters class L