The Graphite Tubes from Analytics are suitable for use in atom absorption spectroscopy. Other AAS comes in different types, such as 10/PAK pyrocoated tube with rings, and 10/PAK coated tube with Omega-Platform for Varian. The Shimadzu has a plane 60° pyrocoated tube and plane 60° uncoated tube. Other manufacturers such as Hitachi, GBC, ThermoElectron, Agilent and Perkin Elmer also offer graphite tubes for AAS.