Clear and amber glass vials with a rounded or flat bottom, and volumes from 5 to 20 ml and closures. A rounded bottom vial is more sturdy and resistant to high pressure during the heating process. Flat bottom vials AYN Chromatography – VWR International 1,5ml SnapCap vial, clear, high recovery, without 11-PSN cap 100 548-1130 1.5-HRCV 1,5ml crimp neck vial, clear, high recovery, without 11