HEPA filter for Hoover WindTunnel bagless canister vacuum cleaners. Located on the side of the vacuum. The original filter manufactured by Hoover is No Longer Available.  This replacement filter is manufactured by Envirocare.

Canister Hoover WindTunnel bag less vacuum models that use filter 59134050 include S3755, S3765, S3755045, S3765040 and S3755080