This 3L PYREX® resin reaction kettle has a cover with openings to accommodate three 24/40 standard taper joints and one 34/45 standard taper joint. Interchangeable standard taper joints allow quick assembly with condensers, stirrers, and funnels. Flanges of cover and bottom are finely ground for a tight seal. For use with heating mantle only. This is the suggested replacement for Corning® item number 6946-3L. Reusable. Material: Borosilicate Glass Code 7740. Capacity: 3000mL. Flask Style: Reaction. Flask Shape: Cylindrical. Top Style: Ground. Neck Style: Wide. Stopper Style: No Stopper. Flask Feature: Heavy wall. Standard Taper Side Neck Joint: Three 24/40. Standard Taper Center Neck Joint: 35/45. Height: 315mm. Outer Diameter: 140mm. Corning® #: 6947-3L.