With fused-in fritted glass disc. For analytical work involving precipitation, drying and weighing. Particularly suitable when precipitates will not be dried at temperatures above 110°C. May be used at higher temperatures, but sudden changes in temperature must be avoided, whether heating or cooling. Available in three porosities: coarse (C) 40-60µm, medium (M) 10-15µm, and fine (F) 4-5.5µm.