Flasks feature sharp, permanent graduation line and large white block letter inscriptions. Body is machine-blown with sealed heavy-tubing neck for increased strength. The 1mL and 2mL sizes are test tube-shaped. Hollow glass ground [ST] stoppers, where included, are interchangeable.
All flasks are graduated to Class A volumetric tolerances and calibrated to meet ASTM specifications E-694, E-542, and E-288. Certified flasks are individually serialized and supplied with NIST-traceable Certificate of Identification and Capacity.
PYREX® Serialized/Certified Volumetric Glassware is now tested and calibrated in an ISO/IEC 17025 certified laboratory.
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