The 100317425 Thin Metal Wall Vacuum Hose is 19.69 inch (500 mm) in length with size NW40 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 2 1/2 inch static bend radius and can be compressed to a 11.7 in. (297 mm) length. Series 31 thin stainless steel wall vacuum hose can be used in rough piping applications.