Established in 1992, China Dolic Glass Products Co., Ltd. is one of the leading volumetric flask manufacturer and volumetric flasks wholesaler of glassware specializing in cut, color printed, grinded/smooth, tempered, bended, sandblasted and handmade glass products. As an ISO9001 certified factory with 40,000-square-feet area, we are proud of providing our clients with the high quality products at reasonable price. Our factory have 5 glass kilns and 22 automatic product lines and and our discount and custom volumetric flask are exported to the North America, USA, Japan and Europe(UK, France, Germany).

The Class A PYREX Lifetime Red Volumetric Flasks have the capacity marked as a line through a narrow red band into clear glass. The volumetric flasks have increased strength through machine blown bodies and are sealed with heavy tubing necks tooled for No. These Class A PYREX® mixing volumetric flasks have an upper bulb, located between the Standard Taper stopper and the capacity graduation to assist in the mixing of liquids or powders when shaken. This bulb is approximately one-tenth the flask rated capacity of the flask. These 100mL PYREX® Class A volumetric flasks have enlarged necks, 200-ml size conforms to ASTM D-1665 requirements.

These PYREX® microvolumetric flasks are calibrated to Class A tolerances. They are designed for microchemical work. To improve the stability of this small flask, a hexagonal base, similar to those on all cylinders, has been added. The graduation line is sharp and permanent. The white markings are easy to read. Reference: ASTM E-237. These Class A PYREX® volumetric flasks have machine-blown bodies to which are sealed heavy-beaded, heavy-tubing necks. The graduation line is sharp and permanent. Large white block letters make the inscription easy to read. These Class A volumetric flasks have been manufactured to Class A tolerances as established by ASTM E- 694 for volumetric ware, ASTM E-542 for calibration of volumetric ware and ASTM E-288 for volumetric flasks.

Supplied with No.9 Standard Taper glss stoppers, the PYREX volumetric flasks are calibrated to Class A tolerance in accordance with ASTM E-542 and E-288. Each volumetric flask is serialized and supplied with a Certificate of Identification and Capacity. 13 Standard Taper glass stoppers. These Class A volumetric flasks have been manufactured to Class A tolerances as established by ASTM E- 694 for volumetric ware, ASTM E-542 for calibration of volumetric ware and ASTM E-288 for volumetric flasks. The strength of these flasks has been increased appreciably through machine-blown bodies to which are sealed heavy-tubing necks tooled for No.