Low form crucible with fritted disc. The 8 ml size is made from a light wall blank and has straight sides which taper from top (approx. 23 mm dia.) to bottom (approx. 20 mm dia.). This size is suitable for microchemical work. Limit of use is 500°C. Nominal maximum pore size: Porosity C, 40 microns, Porosity M, 14 microns, Porosity F, 5 microns. Borosilicate glass.