Unassembled 12 x 32mm Polypropylene Vials Thermo Scientific Sun SRi Wide-opening vials provide an increased target area for easier sample preparation and to reduce the chance of bent or broken needles during sampling Vials are manufactured of Clear, Type 1 Class A or Amber, Type 1 Class B borosilicate glass Requires the use of 10-425 screw thread closures and