Fangrui Product Details Function: This Dust Collector Attachment Possesses A 4-inch Od End That Connects To Standard 4-inch Id Dust Collection Hose And Allows You To To A 3 Inch Dust Collection Hose Or Line Branch. Note: To Connect To Other 4inch Od Ports Or Adapters, A 4inch Flex Cuff Easy To Use: Offers A 4inch Od Profile With Tapered Port On One Side, Fits Inside Most 3inch Dust Collection Hose Premium Quality: Made With Heavy Duty Plastic Material For Long-term Durability And Made To Withstand The Abrasive Nature Of Woodworking And Workshop Dust Collection Dimensions: 4-inch O.d Nominal End To 3-inch O.d Nominal End Connect 3-inch Opening Duct To 4-inch Flexible Hose Transition 3-inch Duct To 4-inch Standard Hose Please Note: The Physical Slightly Color Difference Or Difference, Does Not Affect The Use, Please Do Not Mind, Thank You! Colour:as Shown Material:plastic Package Contents: 1 X 4 Inch To 3 Inch Dust Collection Reducer Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Di