Aluminum body with stainless steel rims. The Gemini was originally planned to be the first release by Northern Spin Co. but was pushed back due to manufacturing difficulty. Instead, Northern Spin Co. took the shape and specs of the Gemini and turned the titanium yo-yo, the Aurora (Which sold out immediately). Mani from Northern Spin Co. says the Gemini bi-metal design was greatly influenced by the Y0YoFactory Catch 22. It should be available for purchase early to mid November and a price point may be set this week.