Features:These high quality carbon fiber propellers work much better than the stock propeller， the stock props or non-carbon fiber props are soft that they cause "Jello effect"， carbon fiber props are lighter and much stronger (you'll know the difference when you get them).This is a very effective way to get rid of the "Jello Effect" and increase the flying efficiency. Each of these propellers were on a balancer for 30 seconds and hand picked to ensure top level performance. You don't even need an anti-vibration mount with these propellers.They are specifically made for Phantom. All parameters are the same as the original Phantom props. Simply put them on and fly!Use for:DJI Phantom，Walkera QR X350Specifications:Material: carbon fiberSize: : 8 x 4.5"Spacing: approx. 8 mmColor: As the picture showsNet weight:21 gPackage weight:31 gPackage included:1 x Pair Carbon Fiber Propeller