8pcs GemFan 4045 (4.0 x 4.5) Tri-Blade Bull Nose Propellers.Green. Glass Fiber Nylon. GemFan 4045 Bull Nose 3-Blade Propellers. Material: Glass Reinforced Plastic/Nylon Hubs: 5mm, Shape: Bull Nose Tri-Blade Includes: 4 CW Green and 4 CCW Green Authorized GemFan Retailer. Direct from Factory