Feature●Molded to an accurate 60° angle for ease in fitting filter paper●Beaded rim for mechanical strength●Long stem, which is constructed of heavy wall tubing●High resistance to chemical attack and mechanical and thermal shockDescription These 50mm diameter PYREX funnels have a beaded edge for strength. They are fabricated from blanks formed to a 60° angle, which permits accurate fitting of the filter paper, thus reducing filtering time.