Niobium sheet, zirconium target, and zirconium tube are all materials commonly used in various applications.

Zirconium tube is a hollow cylinder made of zirconium and is commonly used in the nuclear and chemical industries due to its excellent corrosion resistance and high strength. Zirconium tubes are often used as cladding for fuel rods in nuclear reactors and as heat exchanges in chemical processes.

Overall, Niobium sheet, zirconium target, and zirconium tube are all important materials in various industrial applications due to their unique properties and characteristics.