The Vaniman XL Accumulator is a pre filter cyclone for dust collectors. It acts as a dust separator and pre filter cyclone that pushes debris and dust to the bottom container while allowing separated air to be pulled into the dust collector. Product Features Easily Integrates Into Any Dust Collection System 15 Gallon Removable Debris Capture Container Highly Durable Molded Resin Design Scientifically Tested and Proven to Separate Dust A 3M/Georgia Tech Study Up To 97% Cyclonic Separation Rate of Particles Down to .3 Microns 95% Effective at Precious Metal Reclamation Inlet/Outlet Ports – OD: 4″- ID: 3.75″ Item No.: 10530