Used Chemglass CG-1522-05 heavy-wall 500 mL 3-neck round-bottom boiling flask with standard taper 24/40 outer joints on the center neck and both vertical side necks. This borosilicate glass reaction flask is suited for organic synthesis, reflux, distillation, inert-gas setups, addition funnels, condensers, thermowells, overhead stirring, and general chemistry lab use where a durable multi-neck round-bottom flask is needed. Heavy-wall construction makes it a more robust option than standard-wall reaction glassware for routine lab handling, heating mantle use, and multi-piece reaction assemblies. Flask is used surplus glassware and should be cleaned/inspected before use. Buyer should verify joint sizes, capacity, cleanliness, and compatibility with their setup before purchase. Only the items shown are included.
