This HQ Prop 5.2x3.2x3 Tri-Blade 5" Prop 4 Pack is designed to deliver superior thrust and maximum efficiency for your quadcopter. These props are made with high-quality materials to ensure maximum durability and provide an strong performance. Enjoy smooth and consistent flying with these highly efficient props. With a 5.2 inch diameter, you will have more prop in the air for better catch and response.