The strength of these flasks has been increased appreciably through machine-blown bodies. Sealed, heavy-beaded, heavy-tubing necks are tooled for snap-cap fit.
Graduation line is sharp, permanent and large; white block letters make the inscription easy to read.
1 mL and 2 mL sizes are test-tube shaped and do not include snap caps. 10 mL through 2,000 mL sizes are supplied with snap caps.