50 * 50mm HDPE Opaque Back Catalog number: 8644H-50 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8700B-17 200mm Sieve. 53micron Price on request 8700S-03 200mm Sieve. 1mm Price on request A135-250C Cover for PTFE Beaker Price on request