Quzhou Lab Technology CO,Ltd offer 20ml crimp headspace vials same as VWR 75983-246 vials. 20mm Aluminum Crimp Cap Seals and Vials ensure that a proper seal is made for this demanding application. Vials are manufactured of Clear, Type 1 Class A or Amber, Type 1 Class B borosilicate glass and include a write-in patch for sample identification.