Model Propeller D32/35/36/52/55mm Nylon Propeller 1 Pair Description: Propeller D32mm: External Diameter:32mm Inside Diameter:3.0mm Pitchof Screw:1.4mm Propeller D35mm: External Diameter:35mm Inside Diameter:3.0mm Pitchof Screw:1.9mm Propeller D36mm: External Diameter:36mm Inside Diameter:4.0mm Pitchof Screw:1.4mm Propeller D52mm: External Diameter:52mm Inside Diameter:4.8mm Pitchof Screw:80mm Propeller D55mm: External Diameter:55mm Inside Diameter:4.8mm Pitchof Screw:80mm Package Include:1X Piair Of Model Propeller