ZVac 2 Hoover 303173001 T-Series Bagless, Taskvac, WindTunnel Rewind Washable Primary Blue Filter PREMIUM PRODUCT: Generic Pre Filter Replacement for Hoover T-Series by ZVac Generic Vacuum Pre Filter Replaces Part# 303173001 Made to easily fit Hoover T-series Bagless, Taskvac, Windtunnel Rewind vacuums Removes allergens and dust from the air, helping to relieve allergies and asthma Please note: This is not an OEM product and is not covered under any manufacturer's warranty.