The Hegar Sound Set is a set of 8 urethral dilators.  Each sound has a different sized end, thus the set offers sixteen sizes, ranging from approximately 3mm in diameter to 19mm in diameter (each increase is +1mm). The purpose of this sound set is to gradually and gently enlarge the urethra through insertion of progressively larger sounds. The sounds can also be used in areas other than the urethra, such as anally or vaginally. Each set comes in a zippered velvet-lined case for storage between each orgasmic session.

Note: These sounds are made from chrome-plated brass.