The 100317421 Thin Metal Wall Vacuum Hose is 19.69 inch (500 mm) in length with size NW16 ISO-KF vacuum flanges on each end. This unsheathed vacuum hose has a thin 0.06 in. (0.15 mm) stainless steel hose wall with a 1 5/8 inch static bend radius and can be compressed to a 12.3 in. (313 mm) length. Series 31 thin stainless steel wall vacuum hose can be used in rough piping applications.