General description vhbw offers a set of 2 flat pleated filters designed for multi-purpose industrial vacuum cleaners. These precision-fit filters ensure easy removal and exchange, making them compatible with both wet and dry vacuuming. They are ideal for maintaining a dust-free environment, particularly beneficial for allergy sufferers. Technical specifications Filter class: L - M Dimensions (L x W x H): 21.3 x 11.5 x 5.5 cm Weight of each filter: 139 g Material: plastic / paper Form: rectangular Colour: yellow / orange Washable: Yes Recommended replacement frequency: every 6 months Compatibility and accessories Compatible with Festo / Festool CTM 55E, CTM 55, CTM 44E, CTM 44, CTM 33E, CTM 33 Replacement for: 452923, 500558, 259.307, 6.904-068.0, 6.904-156.0, 454700, 0702400195 Usage These filters allow for efficient vacuuming of both dry fine dust and coarse dirt without the need to change filters between wet and dry cleaning tasks.