WORKSHOP wet dry vacuum bags are designed to collect dry, everyday dirt and fine particle debris like drywall dust in a convenient to dispose of bag. While they are not required for a vacuum they can make debris disposal quicker, faster, and cleaner. These 4 wet dry vacuum cleaner bags fit WORKSHOP 5-9 gallon shop vacuums except the 5-gallon WS0500VA. They also fit most 5-8 gallon Shop-Vac brand wet/dry vacs.* Not for wet use. A cartridge filter should always be used in conjunction with shop vacuum bags to protect the vacuum in the event of a bag tearing. Fits: WORKSHOP models: WS0500WM, WS0501WM, WS0610VA, WS0610VA, WS0910VA, WS0915VA *This NOT a product of, nor is it sponsored or endorsed by Shop-Vac Corp. Shop-Vac is a registered trademark of Shop-Vac Corp.