Tunnels, particularly ear tunnels or flesh tunnels, refer to a type of body modification jewelry used to stretch and expand ear piercings. These tunnels are typically made of various materials such as metal, wood, silicone, or glass, and are inserted into stretched piercings to create a tunnel-like effect. They are popular among body modification enthusiasts and are available in a wide range of sizes, designs, and patterns. Ear tunnels provide a unique and edgy look, allowing individuals to express their personal style and creativity. They are often paired with other accessories to enhance and highlight the stretched piercing.