The mark consists of Large circle, Middle circle one half the diameter of the Large circle and a Small circle one half the diameter of the Middle circle. All 3 circles are centered on a common vertical axis. Middle circle tangent at the top of the Large circle and the Small Circle tangent to the bottom of the Middle circle. The areas between the circles may or may not be colored or tinted, to contrast with the adjacent areas.
Color is not claimed as a feature of the mark.