Brand new Rings built by an electronics engineer with over ten years of experience. Identical to a factory Mutable Instruments Rings in form and function. The panel on this module is manufactured by Magpie Modular, makers of some of the highest quality panels in Eurorack. It is black aluminum with a beautiful textured finish. Calibrated and tested, with factory Rings firmware. Ships promptly with a Eurorack power ribbon and some bonus treats. All our builds come with a one-year warranty, so we stand behind the quality and durability of our modules.