Signal New Waves of PleasureMotion is an intense and thrilling form. The dramatic anodized aluminum spade shaped heads are designed for safe entry and exit with a gentle back swoop. Each end gives a different sensation and each end is fully functional and safe for the body. This high performance toy feels utterly amazing.Aluminum is the most abundant metal in the Earths crust. It makes up 8 percent of the weight of the Earth Solid surface. Its recyable and safe. Aluminum holds temperatures exceptionally well and is compatible with all personal lubricants.Each Tantus Alumina product is created in two fully functional sections. You can collect Alumina and interchange them with each other.