*This is NOT a product of, nor is it sponsored or endorsed by VACMASTER. This is a generic product designed and engineered by . Any use of the names or model designations compatibility. For this products are made solely for purposes of demonstrating compatibility. INCLUDES: 5 VFF21 filters for Vacmaster Vacuums, Designed for Wet-Use Filtration. Compatible with Vacmaster vacs models # 2.5 gallon: VP205, VOM205P. // 3.2 gallon: VHB305M, VHB305M 0101, VHB307WM. // 4 gallon: VF408, VF409, VF410P, VF410P 0201. // 5 gallon: VFB511B 0201, VWMB508 0101. // Armor All vacs models # 2.5 gallon: AA255, AA255W, AA256, VOM205P 0901. // 4 gallon: VO408S 0901. This foam sleeve filter is made of dense, high-quality foam for efficient particle adsorption, such as damp garbage, sawdust, debris, etc. Effectively prevent debris from entering vacuum motor. WASHABLE & REUSABLE. Easy to install and replace, no tools required. It is recommended to clean the foam filter every 1-2 months and replace it every 4-5 months. Product dimensions: 3.94" outer diameter, 6.89" height.