This set of eight Hegar Sounds, each 7.75" long, are made of 316 surgical stainless steel. Each sound in the series is slightly larger than the one before, and slightly larger on one end than on the other, for a total of 16 sizes.

The diameter of Hegar sounds is measured in mm. The sizes in this set range from 3mm to 18mm diameter.

Safety, Care, and Usage: These instruments should be cleaned and sanitized before and after use. We highly recommend using surgical lube with this product. Use of the Hegar Sounds Set, as with all urethral sounds, is recommended under the guidance of a trained expert.