PTFE Beaker Back Catalog number: A135-250 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8700S-20 200mm Sieve. 20micron Price on request 8644T-50 50 * 50mm PTFE (Teflon) Price on request 8700B-08 200mm Sieve. 425micron Price on request