Replaceable paper filter bag for Festool CT 33 Dust Extractor. Filter bag captures and contains 29 litresof dust and debris, helping you work cleaner and more efficiently. The cleanest and fastest way to contain dust and dispose of it completely. Festool filter bags act as the primary, or first stage filter, trapping particles down to 5 microns in size. WIth a double layer of filtration made of tear resistant material, and a cap to seal it for disposal, filter bags are a must for optimum performance and convenience. Filter bags prevent dust from reaching the main filter of the dust extractor, thus greatly extending the life of the main filter and dust extractor. Includes 5 replaceable filter bags. Integrated cap forms a tight seal during bag removal and disposal, keeping the dust contained and off the floor, whilst Trapping particles down to 5 microns in size, extending the life of both the main filter and dust extractor.