✦ Replacement for Shop-Vac 90398 Cartridge Filter 903-98-00 ✦ Also fits 9039800 Filter 903-98-00 for Shop-Vac - Compatible with Shop-Vac H87S550A, Shop-Vac 90398, Shop-Vac 587-24-62, Shop-Vac E87S450, Shop-Vac 587-04-00, Shop-Vac 286-00-10, Shop-Vac 962-15-00 ✦ And replacement for Shop-Vac 394-20-00, Shop-Vac Wall-Mount 394-20-00, Shop-Vac SP650C, Shop-Vac Back Pack SP650C, Shop-Vac Back Pack 286-00-10, Shop-Vac VN92550A, Shop-Vac Hardware Store Wet/Dry Vac VN92550A, Shop-Vac Hardware Store Wet/Dry Vac 962-15-00 ✦ Recommended replacement every 2-4 months.Replacing your filter will help clean your air purifier's air and allow for a healthier lifestyle ✦ Package Includes: 2 90398 Shop Vac Filter + 1 Cleaning Brush