This pleated long-life HEPA cartridge filter fits inside the dust compartment in Hoover bagless uprights with a Twin Chamber System including these popular models U5260900, U5260950, U5262900, U5262910, U5263900, U5265900, U5265955, U5266950, U5268900, U5268950, U5268970, U5269900, U5269955, U52719RM, U52729RM, U57009RM, U5720950, U5720960, U5725900, U5725960, U5750906, U5752900, U5753900, U5753950, U5753960, U5753980, U5760900, U5760910, U5768900, U5786900, U66009RM, U6607900, U6616900, U6617960, U6618900, U6630900, U6632900, U6634900, U6637900, U6637960, U8120900, U8140900, U8147900, U8153900, U8155900, U8161900, U8171900, U8172900, U8173900, U8173950, U8174900, U8174950, U8181900, U8181950, U8183900, U8185900, U8187900, U8187950, U8188900, UH40020, UH40065, UH40110, UH40115CA, UH40125, UH60000. Also refered to as as a Type 201 filter, 43611042 filter or 42611049 filter. Also replaces filter #40140202. Approximately 11 3/4" x 3". Change every 3 to 6 months.