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