Expertly turned from a 16mm solid copper bar, the Mini Turbine from CD Peterson is an essential addition to your EDC.
Each tops diameter measures approximately 15mm (with potential slight variations due to them being manually machined) and is complete with ceramic bearing.
Raw copper will develop a natural patina with time and handling.
You can expect spin times from 6 to 8 minutes on average with this top. With practice, averages of over 8 minutes are possible on a regular basis.