These clear screw thread EPA vials for the collection and storage of water samples comply with the guidelines for establishing test procedures for the analysis of pollutants (Ref. EPA Methods 601, 602, 603 and 604).

• With closure
• Converted from Type I, 33 expansion borosilicate glass tubing
• Open-top, white polypropylene, screw thread closures with PTFE-faced (0.005") silicone rubber (0.120") septa attached
• While vials are not "pre-cleaned," they are packaged in a plastic shrink wrap module, lehr-clean, as they come from the end of the production lehr and then are placed into a corrugated shelf-pack