Eisco Volumetric Flask, 20mL - Class A - Borosilicate Glass, Polyethylene Stopper, 10/19 Socket - QR Code Marking for Calibration Certificate

• CALIBRATION QR CODE ON FLASK || Scan the QR code printed directly on the body of the flask to retrieve a PDF of the calibration batch certificate. Works best if you hold the flask over a solid white background.
• INDUSTRIAL STRENGTH || Made of high quality, heavy duty, borosilicate 3.3 glass. It is microwavable and autoclavable, and can withstand high temperatures and thermal shocks.
• 20mL CAPACITY || Flask has a 20mL capacity and features a single white graduation mark. Class A tolerance, ±0.040mL. Mouth has an 8.5mm inner diameter. Flask size: 1.5" diameter x 4.5" tall.
• CLASS A GLASSWARE || Conforms to ISO 1042 standards. Features uniform wall thickness. The flask has a reinforced rim to protect against impact.
• POLYETHYLENE STOPPER || The flask has an NS10/19 size socket fitted with an inert, chemically-resistant polyethylene stopper. This lightweight stopper is durable and flexible, designed to provide a secure seal even after repeated use.

Volumetric Flask made from high-quality borosilicate 3.3 glass with a single white graduation marking its 20mL capacity. Features an industry-leading feature: a QR code printed on its surface, allowing you to effortlessly scan and retrieve a PDF of the calibration batch certificate. Class A tolerance at ±0.040mL conforms to ISO 1042 standards for accuracy. The flask is equipped with an NS10/19 size socket fitted with a chemically-resistant polyethylene stopper.

Autoclavable, with superior chemical durability. Low temperature gradient - can withstand high temperatures and thermal shocks. Eisco Labs borosilicate glass has the following heat tolerances: Strain Point 515°C | Annealing Point 565°C | Softening Point 820°C.