PYREX®, borosilicate glass.

• Very good chemical resistance
• High temperature resistance
• Minimal thermal expansion, giving relatively high resistance to temperature changes

With a beaded edge for strength. Cone angle 60°. These funnels are fabricated from blanks formed to a 60° angle, which permits accurate fitting of filter paper and thus reducing filtering time. In addition, few funnels have depressed inside flutings which further decrease filtering time.