The broad tips and screw clamp construction keep them from popping off until you remove them. Each clamping implement is tipped in soft red silicone, creating a visually pleasing contrast with the black metal hardware and protecting the skin. Features: Nipple Clips with Faceted Weight and Heavy Metal Chain. Designed for hands free wear. Red Kink Branded Silicone tips on all clamping implements. Attractive black metal hardware. Phthalate free, body safe. Specifications: UPC number 782421059941. Total length 25 inches. Materials Silicone tips, Metal clips, chain. Kink by Doc Johnson is an exciting collaboration with Kink.com to create a collection of high quality authentic fetish items suitable for long-term practitioners and new initiates alike.