This 40ml EPA vial with PP screw cap is made of borosilicate glass. 40ml EPA vial is mainly used for storage solution. The 40 mL vials are offered in clear (Type , 33 expansion) and amber Type , 5 expansion) borosilicate glass. They are avialable in two sizes, 27.5 x 95mm or 29 x 82mm and are packaged 00 vials per box.