or
Borosilicate Glass Watch Glass Used for evaporations on hot plate or over open flame and as covers for heated beakers. Heavy wall and uniform fire-polished edge provide mechanical strength. OD cannot be controlled within close limits slight degree of out-
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Borosilicate Glass Watch Glass Used for evaporations on hot plate or over open flame and as covers for heated beakers. Heavy wall and uniform fire-polished edge provide mechanical strength. OD cannot be controlled within close limits slight degree of out-
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