Forbidden Body Jewelry metal tunnels are 316L Surgical Steel hollow and lightweight. Polished to a perfect, smooth finish. All plugs measure 10mm (3/8 inch) in length, front to back. Forbidden Body Jewelry gauges for ears are available in pairs by gauge size, and also in 8 piece (4-pairs) "Stretching Packs," grouped by incremental sets of 4 gauge sizes. Forbidden Body Jewelry gauges and tunnels are a perfect gift for Birthdays for your boyfriend or girlfriend, your wife or husband, your parents or children, or even your best friends. Forbidden Body Jewelry double flared tunnels are unisex surgical steel plugs that are suitable for men or women. These can be worn for every occasion. INSTRUCTIONS: The gauge size is measured internally, at the narrowest point of the jewelry. To insert these, always moisturize the lobes first. Organic Jojoba oil is an ideal moisturizer for stretched ear lobes. Hold the jewelry against the lobe between the thumb and pointer finger, with the thumb behind the lobe as an anchor. Gently angle the jewelry into the moisturized lobe until is it securely in place, giving a few rotations/twists. Forbidden Body Jewelry is the premier brand for all of your body piercing needs. We only use hypoallergenic materials in all of our piercing rings, studs, and hoops. The seamless design of this body piercing make it easy to use and comfortable to wear all day. Our US based company ships thousands of body piercing jewelry to Amazon Prime customers around the world. Each piece of body jewelry is carefully selected and controlled for quality in our warehouse. From the simple and sleek to the bold and sexy, Forbidden Body Jewelry caters to all of your piercing needs. Both men and women trust our company to provide them with safe, affordable and stylish jewelry that they can wear on their Nose, Ear, Conch, Cartilage, Septum, Tragus, Rook, Lip, Belly, Nipple, Daith and other body parts. You can reach out to our Customer Happiness Team at any time with questions, concerns and inquiries - we are passionate about helping you LOVE your piercings!