Product Details FREE & discreet shipping in the USA for orders over $30! Soul Source GRS trainers have been developed in conjunction with a leading surgeon to help transgender women. Our GRS pelvic trainers are recommended by surgeons throughout the world. These trainers are made of rigid medical-grade silicone, being stable from -50 degrees to +340 degrees Fahrenheit. They may be chilled or used at room temperature. Available in 6 sizes, GRS pelvic trainers can be purchased individually. All orders include a complimentary storage pouch. We recommend lubricating the trainer before insertion. Use ONLY a water-based lubricant. Silicone lubricants can damage the trainer. Always consult your physician regarding the use of pelvic trainers. Stated dimensions for each size are length and diameter. Soul Source trainers are tapered; trainer diameters do not exceed the stated dimensions. For circumferences, please see our Frequently Asked Questions. The information in this website is about a technical device, pelvic trainers. This information should not be used during any medical emergency, or for the diagnosis of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions.