Customized 20ml headspace vials with writing space for gas chromatography PTFE Lined (Certified) – Straight Sided Jars – Amber – CryoCLEAR vials, 2.0mL, STERILE, External Threads, Attached Screwcap with Molded O-Ring, Round Bottom, Self-Standing, Printed Graduations, Writing Space and Barcode, 50/Bag SKU: GS3012-50 16oz Amber Boston Round