Bagless canister Hoover WindTunnel Bagless Canister Dirt Cup Filter #59134033;quantity sold one. This Hoover Filter # 59134033 for the S3755 and S3765, fits in the dirt cup of all Hoover Bagless Canisters -Models S3755-045 & S3765-040 This genuine Hoover Bagless Canister Primary Filter fits inside the dirt container on all Hoover Bagless canisters. It consists of a cylinder shaped cartridge with fanfold filter media between the beige ends. This long life filter can be washed by holding it under running water. The fanfold design provides a large filter media area for reduced resistance to air flow. Bagless Canister Primary Filter # 59134033