This CoorsTek® chemical-porcelain labware desiccator plate has three feet and is 16mm high. It features five 30mm holes. It is glazed on the top surface. CoorsTek® porcelain & ceramic labware has excellent thermal-shock resistance. It remains the responsibility of the user to determine the suitability for use. To prevent thermal stress cracks on porcelain ware, CoorsTek® strongly recommends a heating/cooling rate not to exceed 200°C/hour. To prolong the life of your CoorsTek® labware be sure to follow gradual heating and cooling rates. Use an oven or hot plate as an intermediate step when quicker heating/cooling rates are required. Gradually increase flame intensity when using a gas burner. Avoid contact of heated ware with a cold surface. Carefully inspect your ceramic labware prior to each use. Do not use any product that appears defective. Material: Porcelain. Diameter: 142mm. Number of Holes: 5. Diameter Of Holes: 30mm. Number Of Feet: 3. Height: 16mm. CoorsTek® #: 60446.