Global Life Sciences 47 mm Filter Funnels, Glass - Fritted glass support base/No. 8 silicone stopper (1/pkg) 

The 47 mm glass filter funnels are made of 100% borosilicate glass and they offer excellent chemical compatibility even with the most aggressive solvents.-Borosilicate glass-Chemical compatibility-Ideal for filtration and degassingThe glass filter funnels are ideal for filtration and degassing of HPLC solvents, aqueous mobile phase solutions, and buffers.Ordering information: Materials of Construction: All parts are borosilicate glass except for the clamp and the stopper. The clamp is made of aluminum. The number 8 stopper is made of silicone. This product is not approved for use in medical, clinical, surgical or other patient applications.