Kayak Rudder

I purchased 5 sets of these on Amazon for this year's rainy season, but they were unused and stored. I am selling them because I no longer need them.

1 set: ¥2,500

Highlights from the Amazon listing:
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Kayak Rudder Size - Size: Approx. 47 x 15.5 x 14.2cm / 18.5 x 6.1 x 5.6 inches (Length x Width x Height). Rudder blade length: Approx. 45cm / 17.7 inches.
Sturdy and Robust - Material: Nylon & 304 Stainless Steel. Pin length is approx. 1.8 inches and diameter is 0.4 inches.
Installation and Use - The rudder can be fixed in a raised position to prevent it from self-deploying. Wires run from the blade to the foot brace and are used to control the rudder while paddling.
Control Direction - Vertically mounted on the stern of the kayak. Allows you to control the kayak even in strong winds or rough conditions.
Wide Range of Applications - Works with foot controls (not included) to achieve directional changes. Designed for sea kayaks, kayaks, canoes, fishing boats, etc.