We can customize manufacturing Tantalum seamless tubes or Tantalum welded tubes as the following : Tantalum welded tube/ Tantalum seamless tubing(ASTM B521 92) OD 10 up to 38 mm x wall 0.2-5.0mm x Length 6000 mm max. Niobium welded tube/ Niobium seamless tubing (ASTM B394) OD 10 up to 38 mm x wall 0.2-5.0mm x Length 6000 mm max. Tantalum seamless tubes 19.05mm OD x 0.4mm WT x 1829mm Length; Tantalum welded tubing 19.05mm OD x 0.4mm WT x 1829mm Length; Tantalum tubing 24 mm OD x 0.9mm WT x 1000mm Length; Ta2.5%W alloy tubing 24 mm OD x 1.0mm WT x 5000mm Length; Please e-mail for quote should you have any enquiries, thanks.