50 * 50mm PTFE (Teflon) Back Catalog number: 8644T-50 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8644PP-50 50 * 50mm PP Price on request 8505A-01 Standrad case Price on request 8700B-05 200mm Sieve. 700micron Price on request