Amazon.com: Electric RC Folding Propeller 12×6 inch w/Spinner Size D38×H35mm, and Motor Shaft Diameter φ4.0 with Nylon Plastic Spinner for Remote Control Airplane(12×6, Shaft φ4.0) : Toys & Games
Graupner CAM Folding Propeller Blades 9x5/23x12cm
Electric RC Folding Propeller 12×6 inch w/Spinner Size D38×H35mm, and Motor Shaft Diameter φ4.0 with Nylon Plastic Spinner for Remote Control Airplane(12×6, Shaft φ4.0) : Toys & Games - Amazon.com
CAM Folding Propeller with Spinner 9 x 5 (23 x 12 cm) | Graupner USA