This propeller is made of high quality Fiber Glass, which is extremely lightweight and durable and It is just designed for 700 RC helicopter . You can expect an increase in overall motor efficiency with this excellent propeller.<br><br>Description:<br>Fiber Glass 700mm main blades<br>Material: Fiber Glass<br>High Thrust<br>High durable<br>Extremely lightweight<br>Suit for RC 90 class helicopter &amp; 700 helicopter<br><br>Parameter:<br>Length: 27.5 Inch/700mm<br>Material: Fiber Glass<br>Shaft Hole diameter: 5mm<br>Product weight: 370g<br><br>Package information:<br>Package size: 70 * 5 * 1 cm / 27.5 * 2 * 0.4 in<br>Package weight: 377g / 13.3 oz<br><br>Package list:<br>1 * pair Fiber Glass 700mm main blades