May 21, 2021 · 40 Ml Amber Vials at Thomas Scientific High-quality borosilicate glass and rigid, autoclavable cap Standard open top, flat silicone/ PTFE septum design 40 mL capacity Available in clear or amber Vials are available assembled only or pre-cleaned to EPA protocol B. Independent laboratory certified version is also vial 40ml | Sigma-Aldrich white polypropylene cap (solid), tan PTFE/silicone (EPA Quality), thickness 3.2 mm, 24-400 thread, for use with 20 or 40mL vial, pkg of 00 ea