For small dry debris and wet materials. Fits most Shop-Vac wet/dry vacs except 1X1, Bulldog Portable, Mighty Mini, Hippo, Hang Up Vacs, or AllAround Series. The dimensions are 7" H x 7.5" Dia outside. Inside diam 5.75" x 6.5" without retainer.From the ManufacturerThis cartridge filter has a non-stick surface makes for easy clean up and resists clogging. It is 99.97% efficient dow to 0.3 micron. Fits Shop-Vac® Brand wet/dry vacuums 5-gallon and up.