50 * 50mm PTFE (Teflon) Back Catalog number: 8644T-50 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8700B-20 200mm Sieve. 20micron Price on request 8370H-200S 200mm dia Funnel box of 10 Sterile Price on request 8644N-100 100 * 100mm Nylon (Polyamide) 6/6, FDA Grade, Price on request