(LC) Filtering Flask Borosilicate Glass 100mL Go to amazon.com Related posts 13 best filtration flask for 2022 FeatureMade from Borosilicate Glass with tubulation/side armSturdy wall, and heavy rimAccepts hose with 3/8" inside diameter DescriptionFiltering Flask 100mL. Made from Borosilicate Glass with tubulation/side arm. Sturdy wall, and heavy rim. Accepts hose with 3/8" inside diameter.