High Power Model Rocketry

PK-66 Ultimate Fin Set

PK-66 Ultimate Fin Set - Main image
$15.89 $24.08 In stock

The PK-66 Ultimate Fin Set from LOC Precision is a straightforward replacement or upgrade component for your high power rocket build. This set includes six fins, each with a 1/8-inch thickness, providing a balanced and reliable configuration for your project.

  • Includes 6 precision-cut fins for a complete fin set.
  • Each fin measures 1/8 inch thick for consistent performance.
  • Designed as a component for high power model rocketry.
  • Compatible with LOC Precision rocket kits and builds.
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Christopher ★★★★★

Swapped these onto my 4-inch build after cracking a balsa fin on a hard landing, and the six-pack gave me two spares for future repairs. Being 1/8-inch thick, they feel way sturdier than the stock pieces I had before.

Henry P. ★★★★★

The 1/8-inch thickness gives these fins a solid, rigid feel that handled the build without any warping. Six in the pack meant I had spares in case I messed up a cut, which was a relief. They mounted cleanly and the rocket flew straight as an arrow on its first launch.

George ★★★★★

Cut these to size and they’re perfectly uniform, no warping or rough edges anywhere across the set. The 1/8-inch thickness gives them a solid, rigid feel that should handle the flight loads without any flex. Six fins is plenty for spares or a second build, which makes this a practical buy for anyone