This propeller is made of high quality carbon fiber, which is extremely lightweight and durable and It is just designed for 600 RC helicopter . You can expect an increase in overall motor efficiency with this excellent propeller.<br><br>Description:<br>Carbon fiber 600mm main blades<br>Material: Carbon fiber<br>High Thrust<br>High durable<br>Extremely lightweight<br>Suit for RC 50 class helicopter &amp; 600 helicopter<br><br><br>Parameter:<br>Length: 23.6 Inch/600mm<br>Material: Carbon Fiber<br>Shaft Hole diameter: 4mm<br>Product weight: 271g<br><br>Package information:<br>Package size: 60 * 5.5 * 1 cm / 23.6 * 2.2 * 0.4 in<br>Package weight: 277.5g / 9.8 oz<br><br>Package list:<br>1 * pair Carbon fiber 600mm main blades