50 * 50mm Borosilicate glass (pyrex) Back Catalog number: 8644AB-50 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8700S-13 200mm Sieve. 125micron Price on request 8644S6-50B 50 * 50mm Stainless 316 Bright Polish Price on request 8700B-20 200mm Sieve. 20micron Price on request