Simsii Syringe Filter, Nylon Membrane, Non Sterile Micron Filters, Diameter 30 mm, Pore Size 0.45 um, Disc Shape Blue Corded, Pack of 100: Amazon.com: Industrial & Scientific
Digital Micrometer, Digital Micrometer with LCD Display, Portable Accuracy Micrometer with Fine Tuning Ratchet, Small Item, Outside Micrometers: Amazon.com: Industrial & Scientific
Hydrophilic PTFE Syringe Filters 25mm Diameter 0.22μm Pore Size for Laboratory Filtration by Finetech (Pack of 20) Made in Taiwan (PTFE Hydrophilic 25mm 0.22um, 20): Amazon.com: Industrial & Scientific
Amazon.com: Electronic Micron Micrometer Head, Ergonomic Electric Meter High Hardness Digital Micrometer for Machinery Plant for Mechanical Workshop(0-25mm) : Industrial & Scientific