Brief Instruction:

Round Bottom Flask come with round bottom support and it made by borosilicate glass. It mostly apply on variety experiment as heat up and boiling applications. Unlike flat bottom flask, bottom of round bottom flask is round, cork rings are needed to keep the round bottom flask upright.

The neck of these round bottom flask is standardized, which mean that end of the flask necks are usually conical ground glass joints. The most common joint size are 24/29.