Diamond Plug is a metal butt plug that is easy to insert due to its round shape. The butt plug ensures safe penetration due to the flat bottom. The aluminum alloy material reacts to temperature, allowing users to experiment with temperature. Temperature sensitive metal. Pointed tip for easy insertion. Flat base for safe penetration. Elegant diamond design. Material: Aluminum. Dimensions: Overall Length - 3.26 inches Insertable Length - 1.97 inches Width - 1.34 inches