50 * 50mm HDPE Opaque Back Catalog number: 8644H-50 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8505A-12 Case Price on request 8644T-50 50 * 50mm PTFE (Teflon) Price on request 8700B-06 200mm Sieve. 600micron Price on request