This listing is for a used MDC Vacuum Stainless UHV Kwik-Flange ISO KF Reducer Flange, main tube 2.0" O.D. and secondary tube 1.0" O.D.. Flange O.D. is about 2.69 in and the tube O.D. is 1 1/8"; the end of the tube opposite the flange has a threaded end. Main Flange O.D.: 2.95 in Reducer Flange O.D.: 1.56 in Main Tube O.D.: 2.0 in Main Tube I.D.: 1.10 in Reducer Tube O.D.: 1.0 in Reducer Tube I.D.: 0.80 in Main Tube Depth: 1.19 in Reducer Tube Depth: 1.72 in Height: 2.95 in Unit is used, hasn't been vacuum tested. Comes with a 100% money back guarantee. Please inspect images very carefully to be sure if this will work for your application / function. Please email with any questions! If there is anything wrong with the item that you have purchased, please contact us directly and give. us a chance to help, we respond quickly and will ensure you are satisfied with your purchase and experience! Please do not leave negative feedback or open any disputes with eBay or PayPal. Contact us directly and we will fix the problem quickly.Fast & free shipping We strive for 5/5 Star service! Fast & Free shipping!