TFL CNC aluminum 145mm Rudder with Triangle Rudder Bracket Specs, see picture 3 for the diagram.Length: 92mmHeight: 145mmMounting base; 25mm tall x 28mm wide3mm Brass breakaway rudder screw.Note: Uses 2mm linkage rod. Good for use with boats in the 34 - 40" ( 875 - 1000mm) range.