Envirocare Parts designed to fit with or replace genuine original (OEM) manufacture part numbers: #38765009, will also replace #34174012 Designed to fit the vacuum models listed and more: Hoover Canister Vacuums: WindTunnel S3646---, S3509, S3510, S3511, S3513, S3515, S3517, S3519. S3520, S3523, S3525, S3527, S3530, S3533, S3535, S3536, S3575, S3585, S3595, S3605, S3545, S3547, S3549, S3551, S3553, S3555, S3557, S3559, S3561, S3563, S3565, S3567, S3569, S3571, S3573, S3577, WindTunnel Canister Cleaner S3630---, S3639---, S3639050, S3630050, Commercial Shoulder Vac Portable C2089, TurboPOWER WindTunnel Canister S3649, PowerMAX Deluxe Canister S3601050, Commercial Shoulder Vac Portable C2089 Dimensions: 5 3/8" x 4" Traps and seals-in 99.7% of dust mites, pollens, ragweed, mold spurs, microscopic particles, bacteria, dust mites, germs as small as 0.1 micron, other allergy causing agents, and 99.9% of pet dander. A must for Allergy Sufferers!