8pcs GemFan 5040 (5.0 x 4.0) 6 Blade Propellers. Green. Glass Fiber Nylon. GemFan 5040 (5.0 x 4.0) 6-Blade Propellers. Material: Glass Reinforced Plastic/Nylon Hubs: 5mm, Shape: Normal Includes: 4 CW Green and 4 CCW Green Authorized GemFan Retailer. Direct from Factory.