Description:Brand: Gemfan Length: 4 inchPitch: 4.5 inchMaterial: PC (Poly carbonate)weight: 2.8Hub Id Dia: 5 Hub Od Dia: 12 Hub Thickness: 6.4Adapter Rings: noColor: optional black、 green and orangeUsage: for RC multirotors Package included:6 x CW propeller (Orange)6 x CCW propeller (Orange)6 x CW propeller (Green)6 x CCW propeller (Green)6 x CW propeller (Black)6 x CCW propeller (Black)