The Gemfan 45mm 2-Blade Propeller comes with either a 1mm or 1.5mm mounting diameter, 45mm length, 1.5" pitch, and only weighs .33g each. They perform particularly well on Cinewhoops!Choose a Color:Clear BlueClear GrayClear RedMacho PinkChoose a Hub ID (Shaft Diameter) :1.5mm1mmFeatures2-Blade propellerAssorted colors45mm sizeSpecificationsColors: Clear Blue, Clear Gray, Clear Red, Macho PinkProp Mounting Pattern: Choose 1mm or 1.5mm Model: Gemfan 45mm Cinewhoop PropsProps Diameter: 45mmPitch: 1.5 inchWeight: .33gMaterial: PCIncludes4x Gemfan 45mm 2-Blade Polycarbonate Propeller (CCW)4x Gemfan 45mm 2-Blade Polycarbonate Propeller (CW)