6-Inch Plastic Propellers, Bulk 30-Pack – Build Rubber Band Powered Planes, Helicopters, and More STEM Projects

Designed for STEM Projects: This 30-pack of 6-inch plastic propellers is specifically engineered for rubber band-powered creations, including airplanes, helicopters, and propeller-driven cars.
Easy to Use: The propeller assembly mounts securely onto standard craft sticks, popsicle sticks, or balsa wood measuring up to 0.135 by 0.35 inches, providing a reliable foundation for building.
Directional Thrust Control: Featuring a built-in propeller shaft with a small hook for rubber bands, the design only permits winding in one direction. This ensures the generated thrust consistently moves your project forward.
Adjustable Performance: The propellers generate substantial lift and thrust. Builders can use a single rubber band for a slower, sustained energy release, or double the rubber bands for a quicker, more powerful burst of energy.
Durable Materials: Constructed with high-quality steel and semi-flexible plastic. The plastic blades are resilient enough to withstand minor to moderate impacts, while the steel shaft resists bending during normal use.