زعنفة دقيقة مصبوبة من AeroTech Astrobee/Mirage/Sumo - 11715

Fits the Fin-Lok mount perfectly, and the molded airfoil shape means I didn't have to sand or carve anything for a clean edge. The polystyrene is stiff enough that I wasn't worried about it flexing during the flight, and the glue joint held up fine on my 2.6 inch build.

The high-impact polystyrene feels durable enough for a bigger rocket, and the molded airfoil shape saved me time sanding. Glued onto my 4-inch Fin-Lok mount without any gap issues.

Fits the Fin-Lok mount perfectly out of the box — zero trimming needed, which saved me a good chunk of build time. The high impact polystyrene feels sturdy enough to survive a rough landing or two.