Niobium seamless tube(ASTM B394 - 99) Niobium capillary tube/pipe (seamless) OD1.0 up to 2.0 mm x WT 0.2 up to 0.35 mm x Length 1 meters max. Niobium tube/pipe (seamless) OD 2.0 up to 12.7 mm x WT 0.2 up to 5 mm x Length 6 meters max. - Niobium tubing (welded) OD 10 up to 38 mm x WT 0.2 up to 5 mm x Length 6 meters max