4-blade mini propeller with a diameter of 40mm dedicated to a mini wind turbine and to DC motors with a 2mm shaft. Perfect propeller for mini fan, electric toys, RC Boat, science and education toys, robots, your own DIY projects etc. Technical data Material: Plastic Hubcap diameter: 11mm Overall diameter: approx. 40mm Axle hole: 2mm https://elecena.pl/product/22626547/4-blade-propeller-40x2mm-for-mini-wind-turbine-diy-projects 2023-02-23 https://elecena.pl/product/22626547/4-blade-propeller-40x2mm-for-mini-wind-turbine-diy-projects 2025-06-09 https://elecena.pl/product/22626547/4-blade-propeller-40x2mm-for-mini-wind-turbine-diy-projects 2025-10-26 https://elecena.pl/product/22626547/4-blade-propeller-40x2mm-for-mini-wind-turbine-diy-projects 2025-10-28