These PYREX Brand 5642 Class A volumetric flasks feature machine-blown bodies and heavy-beaded, heavy-tubing necks to provide excellent durability. Volumetric flasks include a linear high-density polyethylene stopper that conforms to stopper dimensions. The graduation line is sharp and permanent. Large white block letters make the inscriptions easy to read. The 2-mL flask is test tube shaped. No more broken stoppers High-density polyethylene stopper won?t break if dropped Volumetric flasks are constructed of borosilicate glass Volumetric flask features 50 mL capacity with ?0.05 mL tolerance. Includes no.9 glass stopper

These PYREX Brand 5642 Class A volumetric flasks feature machine-blown bodies and heavy-beaded, heavy-tubing necks to provide excellent durability. Volumetric flasks include a linear high-density polyethylene stopper that conforms to stopper dimensions. The graduation line is sharp and permanent. Large white block letters make the inscriptions easy to read. The 2-mL flask is test tube shaped. No more broken stoppers High-density polyethylene stopper won?t break if dropped Volumetric flasks are constructed of borosilicate glass Volumetric flask features 50 mL capacity with ?0.05 mL tolerance. I