Laboratory quality slow speed filter paper with low ash content - available in 3 sizes ( 9cm, 12.5 cm and 15 cm). Also available in medium and fast speed. Use 'slow' paper when very high purity filtering is required and 'fast' paper for rapid quantitative filtering (or for liquids that are typically difficult to filter). 'Medium' speed is a good compromise between the two and ideal for all-around use.
Box of 100 circles.