50 * 50mm PTFE (Teflon) Back Catalog number: 8644T-50 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8700S-06 200mm Sieve. 600micron Price on request 8644T-100 100 * 100mm PTFE (Teflon) Price on request A105-100 PTFE Funnel Price on request