Corning 9990-75 Ribbed Watch Glass/Beaker Cover, 5mm Diameter (Pack of 12)
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<b>[Product Information]</b><br>
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<li>PYREX 125mm diameter ribbed watch glass/beaker cover</li>
<li>Fits Griffin Beaker size 1000mL</li>
<li>Borosilicate glass code 7740</li>
<li>Heavy duty rim; reusable</li>
<li>Diameter: 125mm (approx)</li>
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