GC packed column for Large Valve Oven, UltiMetal tubing, 41.28 mm coil, 20 inch (0.51 m) x 1/8 inch, 2.1 mm, 1.2% DC-200 (500 cSt) on Chromosorb PNAW packing, mesh size 80/100, preconditioned, with 50 cm x 1/16 inch, 0.75 mm welded ends