Safe Material -- Made of superior zinc alloy, safe, non-poisonous and no odor Multiple Size -- Multiple size for you to experience. Small size: 25mm x 73mm; Middle size: 34mm x 85mm; Large size: 40mm x 95mm; For beginner and advanced users Elegant Appearance -- Artificial heart shaped luxury jewelry design on the base and many colors for choosing Smooth Surface -- Nice touch feeling and easy to insert, and convenient to insert inside, which brings you enjoyable experience Perfect Service -- SKM is committed to provide great customer service and the high quality products to our customers. If you have any questions, please contact with us and we will try our best to help you solve them