Worked extremely well to connect my Delta 14" bandsaw dust port to a vacuum attachment.  Had the typical problem where the port on my bandsaw was 5" and couldn't figure out how to hook it up.  Went with one of these (http://www.amazon.com/gp/product/B00B6JE7DA?psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s00) and had to pop the outermost rivet to get it to fit over the 5" output as they are the same size and then sealed it up with Foil Duct tape.  Worked like a charm and used a 10' 4" powertec dust collection hose (http://www.amazon.com/gp/product/B005VRVGUA?psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s02) with a 4" to 2.5" reducer (http://www.amazon.com/gp/product/B0000223YJ?psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s03) to connect it to my shop vac.  Works great and helps keep the project dust down as I don't have a central dust collection system setup.