Lid has a flat ground surface allowing it to be greased or used with an o-ring.
Material: Borosilicate Glass
Five Neck
Heavy wall
Flat Flange and Interchangeable Joint.
Low Expansion Borosilicate Glass.
Central: 19/26, Parallel: 19/26, Side 5°: 24/29, Side 10°: 19/26, Side 15°: NA
Central: 19/26, Parallel: 14/23, Side 5°: 14/23, Side 10°: 14/23, Side 15°: 29/32
Central: 29/32, Parallel: 14/23, Side 5°: 14/23, Side 10°: 14/23, Side 15°: 29/32
Heat Resistant
Chemical Resistant
Used in Chemical Laboratory

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Ltekonline are the manufacturers of Five Neck Reaction Flask Lid Glassware Flasks used to demonstrate engineering principles in Engineering Colleges, Engineering Schools and Laboratory Glassware for Engineering Teaching Lab in Universities