These flasks with tubulation are blown in special molds in shapes designed to give maximum mechanical strength. For convenience, the flasks are graduated to show approximate capacity. The neck finish affords an excellent fit for rubber stoppers. Tubulation O.D. on sizes up to 1000 mL is 10 mm. Tubulation O.D. for 2000 ml and 4000 ml is 12.5 mm.
Unit of Measure


N/A 4000 mL

Rubber Stopper No.

N/A 12

Grad. Range

N/A 1500-4000 mL

Grad. Interval

N/A 500 mL

Approx. OD

N/A 198 mm


N/A 356 mm

Tubulation OD

N/A 12.5 mm