Set of 6 Carbon Fiber Balanced Propellers for DJI Flamewheel F450 F550. Size 1038, same as the factory props. 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. The propellers were factory balanced to ensure top level performance. You don't even need an anti-vibration mount with these propellers. They are specifically made for Flamewheel F450, F550. All parameters are the same as the original props. Simply put them on and fly! If you want a set of prop guard for your F550 or F450, please click the following links: F550 Prop guard F450 Prop guard You might be interested in this Dual Battery Mount for DJI Phantom to get extended flying time. Shipping Policy: Domestic shipping will take 2-3 business days to ship out and will take an additional 2-7 business day to deliver once shipped out. International shipping will take 1 to 6 weeks to deliver depending on different country. Thanks and happy bidding!