Agilent GC tubing includes high-quality copper, stainless steel, and UltiMetal Plus tubing, which are manufactured and cleaned for chromatographic use. Agilent tubing comes in different lengths and depending on your flow requirements, is available in 1/16, 1/8, or 1/4 inch. UltiMetal Plus tubing is available in 1/16 inch for inert environments.