These nipple clamps with chain from Ouch! are easy to use and suitable for both him and her. The clamps and chain are made of stainless steel and aluminum, and are completely nickel-free. You can use the nipple clamps for your naughty secrets, or for extra stimulation while making love. Length Chain: 355 mm. Material: Stainless Steel, Aluminum and Rubber. Dimensions: 1.97" x 3.54" x 5.51". Weight: 2.75 oz.