50 * 50mm Borosilicate glass (pyrex) Back Catalog number: 8644AB-50 Manufacturer: Sampling Systems Availability: In the manufacturer's stock Price on request - + Recommended 8644N-50 50 * 50mm Nylon (Polyamide) 6/6, FDA Grade, Price on request 8500A-01 Superior case Price on request 8703A-15 15ml Automatic burette Price on request