PTFE Beaker Back Catalog number: A135-500 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8700S-04 200mm Sieve. 850micron Price on request 8700S-18 200mm Sieve. 32micron Price on request 8644AB-50 50 * 50mm Borosilicate glass (pyrex) Price on request