These parts appear to be New-Old-Stock and-or Salvage Parts in excellent condition. They are from a kayak pro shop that closed. Your satisfaction is guaranteed.
Best used as a replacement small rudder blade is for Hobie Mirage series kayaks outfitted with the Mirage Twist-N-Stow rudder system. Hobie part number 81395201. Blade is almost 12.25 inches in total length and about 5.5 inches wide. There are six screw holes on the top edge. Screw holes are in two rows, one inch on center from each other by row.