• INDUSTRIAL QUALITY || Pack of 12 narrow neck Conical Flasks made from high quality, heavy duty borosilicate 3.3 glass conforming to USP Type-1 and ASTM E438 Type-1, Class A requirements. Excellent chemical resistance and strength against breakage. Microwavable and autoclavable - can withstand high temperatures and thermal shocks
• NARROW NECK || Standard narrow neck ideal for mixing. Mouth accepts a size #6 stopper
• SUPERIOR DURABILITY || Features uniform wall thickness ideal for heating and a reinforced rim for protection against high impacts
• DUAL GRADUATIONS || Easy-to-read white enamel dual graduated scale for added accuracy when filling or dispensing
• MEETS ASTM E1404 STANDARDS || Conforms with ASTM Specification E1404, Type-1, Class-1 requirements for glass conical flasks

Pack of 12 narrow neck Erlenmeyer (Conical) Flasks with 250mL capacities are made from high quality, heavy duty borosilicate 3.3 glass conforming to USP Type-1 and ASTM E438 Type-1, Class A requirements. Excellent chemical resistance and strength against breakage. Features easy-to-read white enamel dual graduated scale for added accuracy when filling or dispensing, a uniform wall thickness ideal for heating, and a reinforced rim to protect against accidental impacts. Conforms with ASTM Specification E1404, Type-1, Class-1 requirements for glass conical flasks. Size: 3.3" diameter x 5.7" tall. Mouth accepts a size #6 stopper.