1. About the set - It consists of acrylic single flared stretch rod, bone rod and silicone double flared 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 while sleeping. It won't hurt your ears, and it's secured with two O-rings so it won't fall off. 4. About the set - It consists of acrylic single horn expansion rod, 1.6mm-12mm bone rod and silicone double horn meat tunnel 3mm-12mm. Be careful, expansion rods and bone rods do not contain 12mm 5.Benefits for ears - The ultra-thin silicone material endows it with good skin tolerance, allowing you to wear it while sleeping without stress. It adapts to the ear and is barely noticeable. It won't hurt your ears.