These heavy nipple clamps are built for your intense sensation play Rubber-tipped for comfort, you will be able to test your own limits, or those of your partner, when you apply the optional weights. Each barrel weighs 4.5 oz. and will pull down on your sensitive nipple just the way you love it Perfect for the masochist who wants a little more pain with their pleasure Measurements: 6 inches in total length. Clamp opens to .5 inches. Barrels weigh 4.5 oz. Material: Metal. Color: Silver and black.