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This 14pc Deluxe Flat-Ended Sound kit is a great for kit for beginners or advanced users of urethral play. This kit contains 14 pieces of chrome-plated brass urethral sounds. These sounds are slightly curved and measure 7.5" in length and 5.5" insertable length. The sounds range from 4 French to 17 French (see conversion sheet below). The sounds are flat on one end for easy gripping or electro play. These sounds come in a black velvet lined zippered case for easy storage and for travel.