General description Premium flat pleated filters designed for use with Hilti VC 20 U, VC 40 U, UM (LF 4) and Karcher NT25, NT35, NT45 vacuum cleaners. These filters are suitable for various applications including wet and dry vacuuming, floor cleaning, and robotic vacuuming. Technical specifications Type: Flat pleated filter Compatibility: Hilti VC 20 U, VC 40 U, UM (LF 4), Karcher NT25, NT35, NT45 Quantity: Set of 4 filters