50 * 50mm PTFE (Teflon) Back Catalog number: 8644T-50 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8644S4-100S 100 * 100mm Stainless 304 240grit Price on request 8700B-10 200mm Sieve. 250micron Price on request 8700B-06 200mm Sieve. 600micron Price on request