As an Amazon Associate, we earn from qualifying purchases. Home » Cole-Parmer » EW-34680-60 Stainless Steel Tubing, 304. 304 Stainless Steel tubing is perfect for use in gas chromatography Make your own GC col... Cole-Parmer . EW-34680-60 Attributes Brand name, Manufacturer name, ManufacturerCole-Parmer