Flask, Volumetric, A-Class, Clear, with PE SL.Fla1307

Class A Precision Accuracy: The flask is individually tested and calibrated in accordance with the To Contain (In) volumetric method at the standard reference temperature of 20°C. It offers an exceptionally low tolerance of only ±0.25 mL.

Heat-Resistant Borosilicate Glass: The flask body is molded from thick, transparent borosilicate glass with a low thermal expansion coefficient, providing excellent thermal shock resistance and outstanding chemical resistance against most strong acids and alkalis used in laboratory applications.

Sharp Calibration Mark: The long tapered neck is integrated with a clearly engraved white circular calibration line, allowing technicians to accurately align the lower meniscus for precise volume adjustment without visual obstruction.

Leak-Proof Tight-Sealing PE Stopper: Supplied with an octagonal Polyethylene (PE) stopper fully compatible with the 19/26 ground glass joint. The tight-sealing stopper effectively prevents solvent evaporation and eliminates leakage during inversion and mixing operations.

ISO/GLP Quality Management: Each flask is permanently marked with a production Batch Number on the glass body, enabling convenient data verification, calibration tracking, and full equipment traceability in compliance with ISO/GLP laboratory standards.