Megaton Dust Cyclone Collector Separator Vacuum Adapter CPS-146MIt separats most of the material and dust so that the filter of the vacuum will have to receive a minimum of the waste. Mounted on a drum, cask (made of solid plastic or metal, not included) you will get a well working alternative to much more expensive and heavy dust collections. Material: Polycarbonate Inlet and Outlet diameter: 100 mm (4") Low Pressure Drop High Efficiency Easy to Maintenance N. W.1. 4kg Made in Taiwan Compatible with Megaton 4"