- Heavy walls
- Replaceable tube
These PYREX heavy wall flasks have a seated bent, removable plastic tubulation in a grommet. Should the flask be upset, the grommet acts as a shock absorber. For convenience, the flasks are graduated to show approximate capacity. The neck finish affords an excellent fit for rubber stoppers. Tubulation O.D. is 12.5 mm. 1234G35 is replacement removable plastic tubulation and grommet.