United Scientific™ Volumetric Flasks, Class A, Individually Certified, Wide Mouth, Amber Glass, Qr, 20ml

Borosilicate glass volumetric flask with 20ml capacity, amber-colored to protect light-sensitive materials. Manufactured as per ASTM E288 Class A serialized glassware specifications and calibrated to contain (TC). Heavy-duty and uniform wall thickness, with a wide mouth for easy pipette access. Features durable white enamel printing and a diamond-etched graduation line. A printed QR code allows for easy access to the calibration certificate from a mobile device or computer. A paper certificate is also included.