50 * 50mm HDPE Opaque Back Catalog number: 8644H-50 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8700S-08 200mm Sieve. 425micron Price on request 8370H-100S 100mm dia Funnel box of 50. Sterile Price on request 8700S-11 200mm Sieve. 180micron Price on request