4" 102mm Rotor Diameter Plastic 7 Blades Ducted Fan Blade Product Name : 7 VanesDucted Fan Vane;Rotor Diameter : 4"(102mm) Fit Motor Shaft Diameter : 8.5mm/ 0.33";Hub Diameter : 41mm/ 1.6" Total Height : 60mm/ 2.4";Material : Plastic Color : Black;Weight : 52g Package Content : 1 x 7 VanesDucted Fan Vane