Narrow mouth, with reinforced beaded top and capacity scale. Flasks have durable white scales to indicate approximate volumes at various levels, useful in measuring and mixing solutions where a high degree of accuracy is not a prime consideration.
| Capacity | 125 mL | 250 mL | 500 mL | 1000 mL | 2000 mL | 4000 mL |
| Graduation Range (mL) | 50 to 125 | 50 to 225 | 100 to 500 | 250 to 1000 | 600 to 2000 | 1000 to 4000 |
| Graduation Intervals (mL) | 25 | 25 | 50 | 50 | 100 | 250 |
| Height (mm) | 108 | 130 | 174 | 213 | 275 | 355 |
| Widest OD (mm) | 66 | 82 | 102 | 128 | 161 | 208 |
| Rubber Stopper Size | 5 | 6 | 7 | 9 | 10 | 10 |