These black 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 150gm. 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. Barrels weigh 150gm. Material: Metal Coated.