The funnels are made of borosilicate glass which is resistant to breakage due to thermal expansion. The top opening has a diameter of 75 millimeters. The Stem is 8 millimeters outside diameter x 4.7 millimeters inside diameter and the length of the stem is 7.5 centimeters.
Sold in a case of 120 funnels.
Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.