Hollow urethral plug Product Details Hollow urethral dilator is made of high quality stainless steel material, exquisite workmanship, easy to clean. Small hole design at the top, you can wear a rope for easy storage. Waterproofing Easy to clean It needs to be cleaned before and after use, and the stainless steel material can be in direct contact with water. 5 sizes of urethra plugs Instructions for use Size: 8mm/0.31in, 9mm/0.35in,10mm/0.39in,11mm/0.43in,12mm/0.47in Warm tip： 1. Please make sure to clean the urethral plug before use. 2. Adequate lubricant helps to use. 3. Gentle and slow movements are recommended for use. 4. Pure manual measurement, may appear 1-2mm error, is normal.