Product_description: ['Buchner funnel with fixed perforated plate, glazed both inside and outside with the exception of the top rim -Follow gradual heating/cooling rates -Avoid contact of heated ware with a cold surface -Use an oven or hot plate and an intermediate step when quicker heating/cooling rates are required -Carefully inspect labware prior to each use and do not use any product that appears defective The Porcelain glassware is widely used in the chemistry laboratory. It has excellent resistance to all reagents except hydrofluoric acid, and is highly resistant to thermal shock while having a very low coefficient of expansion.The average coefficient of expansion from 20 to 200C is 3.56 x 10']

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