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The 13.8X13 A4R PROP is a new and unique Polastorm propeller manufactured in the factory using cutting-edge aerospace casting techniques for marine aluminum propellers. It is of high grade and resilient to tearing and corrosion. It is significantly more powerful than standard die-casting and die-casting fittings because it has a tensile property of 280 MPA and a yield strength of 220 MPA. Marine aluminum propellers have a much more durable and robust design than ever before because of sophisticated aerospace casting advancements using hybrid castings of strontium, aluminum, and titanium.
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