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These 50 mL PYREX® round bottom boiling flasks have full length outer 24/40 Standard Taper joints, but with shorter necks. They are carefully designed and manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results an…

With full length joints, but with short necks.The 100, 250, and 500 mL flasks are replacement parts for organic chemistry kits (Cat. Nos. 6949 through 6949K).

These 250 mL PYREX® round bottom boiling flasks have full length outer 29/42 Standard Taper joints, but with shorter necks. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the…

These 500 mL PYREX® round bottom boiling flasks have full length outer 29/42 Standard Taper joints, but with shorter necks. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the…

With full length joints, but with short necks.The 100, 250, and 500 mL flasks are replacement parts for organic chemistry kits (Cat. Nos. 6949 through 6949K).

With full length joints, but with short necks.The 100, 250, and 500 mL flasks are replacement parts for organic chemistry kits (Cat. Nos. 6949 through 6949K).

With full length joints, but with short necks.The 100, 250, and 500 mL flasks are replacement parts for organic chemistry kits (Cat. Nos. 6949 through 6949K).

With full length joints, but with short necks.The 100, 250, and 500 mL flasks are replacement parts for organic chemistry kits (Cat. Nos. 6949 through 6949K).

This 2800 mL wide mouth PYREX® Fernbach-style culture flask is designed for culturing organisms requiring a large surface area to volume ratio. It can also be used in serum production. This flask has a heavy beaded rim to protect against chipping and include a large marking spot.Note: Do not use this flask on a heat source smaller than the base of the flask. Uneven heating of the flask could cause breakage.

This 2800 mL wide mouth PYREX® Fernbach-style culture flask is designed for culturing organisms requiring a large surface area to volume ratio. It can also be used in serum production. Triple baffled on the bottom outside edges to achieve maximal oxygen transfer to culture medium. Beaded neck rim is approximately 60mm I.D. and accepts cotton plugs or No. 13 rubber stoppers. This flask has a large marking spot.Note: Do not use…