1. About the set - It consists of acrylic single horn stretching rod, bone rod and silicone double horn meat tunnel. 2. High Quality Material: High quality silicone and super light acrylic, so you can wear it without stress. And very durable. Ultra-thin design, perfect fit to the human body, non-allergic. The soft material conforms to the ear and is barely noticeable. It is also absolutely safe for allergy sufferers. 3. Unique design: It adopts ultra-thin silicone and can be worn when sleeping. Wont hurt your ears, its secured with two O-rings and wont fall out. 4. About the set - It consists of acrylic single-flare flared rod, 1.6mm-12mm bone rod and silicone double-flared meat tunnel 3mm-12mm. Note that expansion rods and bone rods do not contain 12mm 5. BENEFITS FOR EARS - The ultra-thin silicone material gives it good skin tolerance, so you can wear it while sleeping without stress. It adapts to the ear and is barely noticeable. It wont hurt your ears.