50 * 50mm PS Back Catalog number: 8644PS-50 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8700B-09 200mm Sieve. 300micron Price on request 8644AB-50 50 * 50mm Borosilicate glass (pyrex) Price on request SSS-888 Sterile Bag 254 * 382. Box of 1000 Price on request