100 * 100mm PTFE (Teflon) Back Catalog number: 8644T-100 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8644AB-50 50 * 50mm Borosilicate glass (pyrex) Price on request 8700S-08 200mm Sieve. 425micron Price on request 8700B-12 200mm Sieve. 150micron Price on request