Add these Mary Jane themed nipple clamps to your ensemble and accessorize according to your favorite plant! With these delicate, nickel-free, metal ornaments, the leaf dangles at the end of each clamp. The clamp itself is made of nickel-free metal as well for sensitive skin. To protect the nipples, the tips are covered in vinyl. These are perfect for using with newbies and experienced users alike! The adjustable turn-screws allow you to choose exactly which pressure you want! After use, simply rinse with water and mild soap, then spray with a toy cleaner. Take one clamp in one hand and grab the nipple in the other hand. Place the clamp right below the nipple along the areola. As you clamp down, adjust using the screw and move slowly. Apply pressure very slowly and release slowly. Every little movement will cause some amount of sensation or pain, so be intentional. Keep it on for no longer than 30 minutes the first few times. As you remove them, keep in mind that removal can be twice as intense as application! Enjoy! Measurements: Overall length: 3.5 inches. Clamps open up to 0.5 inches wide. Materials: Metal, vinyl, enamel Color: Green, metal