Corning® PYREX® Flasks with Short Ring Necks

These round bottom boiling flasks have short ring necks and are designed to be used with rubber stoppers. These ring neck boiling flasks are precisely tooled for uniform stopper fit. The reinforced rim increases mechanical strength. These flasks are used in applications requiring rigid stoppering and as wash bottles in routine lab washing. 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 toughest lab conditions. The normal working temperature for PYREX boiling flasks is 230°C.
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Cap. (mL): 250
Rubber Stopper No.: 5
Approx. O.D x H (mm): 83 x 120

Cap. (mL): 500
Rubber Stopper No.: 6
Approx. O.D x H (mm): 102 x 160

Cap. (mL): 1000
Rubber Stopper No.: 8
Approx. O.D x H (mm): 130 x 185

Cap. (mL): 2000
Rubber Stopper No.: 10
Approx. O.D x H (mm): 162 x 232

Cap. (mL): 3000
Rubber Stopper No.: 10
Approx. O.D x H (mm): 184 x 260

Cap. (mL): 5000
Rubber Stopper No.: 11
Approx. O.D x H (mm): 221 x 310

Cap. (mL): 12000
Rubber Stopper No.: 11
Approx. O.D x H (mm): 295 x 378

Cap. (mL): 22000
Rubber Stopper No.: 14
Approx. O.D x H (mm): 349 x 426