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