MDC Vacuum Stainless Steel Braided Hose, 1/4" tube O.D., vacuum metal corrugated roughing hose overall O.D. 7/16" (0.439"). Hose has 2 Let-Lok 1/4" fittings. The fittings have a thread diameter of 7/16" thread and O.D. 9/16" (0.557"). The tube in the interior of the braided hose has O.D. 1/4" and I.D. ~1/8". Overall braided hose O.D. is 7/16" (0.439"). Hose has not been tested in a vacuum environment. No questions, 100% money back guarantee. Please e-mail us with any questions you have! 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!