Brand Name: Gemfan ; Model: 3052 ; Number of Blades: 3 ; Size: 3052, 3.0x5.2 ; Material: PC ; Weight/G: 1.65g ; Center Hole Inner Diameter: 1.5/5mm General Hole ; Propeller Size: 11mm ; Center Thickness: 6mm ; Maximum Blade Width: 11.1mm ; Compatible Motor: 1306-1806 ; Package Includes: : 12 * CW 30523 Blade Propellers; 12 * CCw 30523 Blade Propellers;