8 Pcs DAL T4045BN (4.0 x 4.5) Tri-Blade.Blue. 4CW and 4CCW. Special Poly Carbon Glass Injection Material Pre-balanced, "indestructible" 4045 ( 4.0 x 4.5) Tri-Blade propellers made from super tough glass reinforced polycarbonate. Will fit most 150mm to 180mm mini quadcopters. Hubs: 5mm, Shape: Bull Nose Includes: 4CW Blue and 4CCW Blue Authorized DAL PROP Retailer