Flask Conical 250ml, Socket size 29/32, narrow neck, with interchangeable joint, borosilicate glass-EIS-CH0428G offers a thoughtfully designed, durable resource for hands-on learning. Made of high quality Borosilicate glass Conical shape for spill prevention Narrow Neck. Features interchangeable joint with a 29/32 socket size 250ml capacity. White graduation lines, marked every 50ml from 100ml to 250ml Perfect for any science or home laboratory 250ml capacity, narrow neck conical flask. White graduation lines, marked every 50ml from 100ml to 250ml. Features an interchangeable joint with a 29/32 socket size. No stopper included. Made of high quality borosilicate glass. Flask stands 5.5" tall and has a base measuring 3.25" in diameter.