Head Space Vials. Worldwide Glass Resources Headspace Vials – Manufactured from Type 1 Borosilicate glass – Available in 6ml, 9ml, 10ml, 12ml, 20ml and 27ml – Clear or Amber – Finishes available in 20mm standard crimp seal or beveled finish and 18mm screw thread – Radius (Rounded) bottom or flat bottom styles. Add to Quote. Product