Made from zinc and aluminum alloy metal. They are safe, non-toxic and odor-free.
Its surface is quite smooth, nice touch feelings in hand, and convenient to insert inside.
Size aprrox: large: 3. 6" x 1. 6", medium: 3. 35"x1. 3", small: 2. 95"x1. 1".
Give you the feeling of super stimulation and comfortable. Please note hygiene before and after use.
Can be heated or cooled with water, different temperatures will bring you unexpected feeling.