The silicone sounds are soft, flexible, and gentler than metal sounds so they are great for beginners and perfect for experienced users looking for a soft stretch. The graduated sizes make it easier for them to work their way up. - Mistress Isabella Sinclaire. Made of premium, phthalate free and non-porous silicone, these urethral sounds are easy to sterilize and body safe for an all new sounding experience. These flexible rods bend with the body, sliding down your shaft for that unique sensation that you crave. Each sound is double sided, with a different sized girth on each end. The graduated sizes allow you to work your way up until your stretched out piss hole can accommodate the largest rod! One of the most sought after Dominas in the world, Isabella Sinclaire has been a pillar of the fetish community and a fetish icon since 1993 and one of the first Pro Dommes with an online presence. She is a revered expert with an unparalleled knowledge on all types of BDSM activities and a deep understanding for those that participate in them. Isabella Sinclaire is also an international film star that has created or starred in over 60 BDSM films. The Isabella Sinclaire Signature Collection features exceptionally crafted tools of the trade, personally hand picked by Isabella Sinclaire for your satisfaction. Each piece reflects her style, sophistication, skill and class. Measurements: Each sound is 8 inches in length. The smallest has a diameter of .19 inch on one side and .23 inch on the other. The medium is .27 inch and .32 inch in width. The large is .34 inch and .38 inch in width. Material Silicone. Color Black. Disclaimer: These products as with all products on this site are supplied AS IS. No warranty is given either implied or expressed. Products are intended as novelty only, and no representation is made or implied as to their suitability or safety for any particular use. Purchasers use the products entirely at their own risk. The manufacturer or re-seller is not liable for any direct, indirect, incidental or consequential damage or loss howsoever arising caused by use or misuse of the products. This includes, but is not limited to, damage to the products and personal injury or damages due to use or misuse.