Round form evaporating dish includes lip. Autoclavable and can withstand temperatures to 1150 degrees C. To prevent thermal stress cracks, we strongly recommend a heating/cooling rate not exceeding 200 degrees C per hour. Resistant to thermal shock with an average coefficient of expansion from 20 degrees C to 200 degrees C is 3.56 x 10-5, gradually increasing to 4.69 x 10-5 at 1050 degrees C. Every batch of porcelain is heat tested in our factory. Every batch of porcelain is heat tested in our factory. No glaze-softening occurs up to 1000 degrees C and it is extremely white. Resistant to acids and alkalies, except for hydrofluoric acid. Glazed both inside and out with 70ml capacity. 6 per pack.