StonyLab Quantitative Filter Paper Circles, 46mm Diameter Cellulose Filter Paper with 20 Micron Particle Retention Medium Filtration Speed, Pack of 100 : Amazon.co.uk: Business, Industry & Science
CS-150-P10-A Filter insert SPIN ON filter, 10 µm, MP FILTERS
98% On 5 Micron Particle G3 Filter, Automation Grade: Automatic