This sleek sound features a tapered urethra-stimulating shaft with a subtle taper for easy insertion made of body-safe premium medical grade stainless steel, smooth and durable hypoallergenic, will never rust safety, care, and usage:this toy is recommended only for those experienced with cbt and sounding. Do not sleep in this or any other sounding device. Clean using alcohol and warm water after each use, and allow to completely air dry before storage, or use. For insertion, we recommend use with a hypoallergenic physician recommended lube.