PTFE Beaker Back Catalog number: A135-250 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8700B-12 200mm Sieve. 150micron Price on request 8644T-50 50 * 50mm PTFE (Teflon) Price on request 8700B-13 200mm Sieve. 125micron Price on request