PLEASE NOTE: This cone reducer is specifically designed to work exclusively with 4inch and 2-1/2inch hoses It is NOT intended to fit or accommodate a 2-1/2inch OD or 4inch OD dust collection equipment port directly FUNCTION: A handy double sided adapter that allows you to from your larger (4inch) dust collection hose to a smaller (2-1/2) shop vacuum hose branch line. The 2-1/2 in. opening also allows you to fit for , and a variety of other wet/dry vacuum cleaners Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! INCLUDES: 4inch to 2-1/2inch Dust Collection Hose Reducer PREMIUM: Made with high quality plastic for long-term durability and to withstand the abrasive nature of workshop dust collection, Manufacturer: Akfldms