The Black Diamond Foam Wet Filter - 5-16 Gallon is specially designed for efficient liquid clean-up, making it the ideal choice for wet pick-up tasks. Compatible with most Black Diamond and Shop-Vac wet/dry vacuums ranging from 5 to 20 U.S. gallons, this reusable filter is perfect for tackling water, spills, and other wet messes without compromising suction performance. Its durable foam construction allows moisture to pass through while blocking debris, helping to protect your vacuum motor and extend the life of your machine.