Cover for PTFE Beaker Back Catalog number: A135-250C Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8644T-100 100 * 100mm PTFE (Teflon) Price on request 8644AB-50 50 * 50mm Borosilicate glass (pyrex) Price on request 8700S-11 200mm Sieve. 180micron Price on request