Borosilicate Glass Claisen Adapter - Two necks parallel, Socket size 19/26, Cone size 24/29, Each

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Borosilicate Glass Adapter - Two necks parallel, Socket size 19/26, Cone size 24/29, Made of Heavy duty borosilicate glass. ( lower case h shape)Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.