YO044B Model: 11*7E. Material: plastic. Fuel source: electric. The hubs may be precisely adapted to motor shaft diameters of 3mm， 3.175mm， 4mm and 5mm. Size: 11*7 inch. Thickness of hub: 11.3mm. Weight: 20.2g/0.71oz. One propeller and one locating ring set included in a set. 5 sets in total in each lot.   Package Details Weight: 37.45 g Size: 28.3*2.7*1 cm Package Includes 5 × Propeller Set