muito bom, recomendo a todosGot to give this product a big thumbs up for price and quality. Same as the item from Fusano but costs a lot less. Fitted them to my 550e to improve visibility. They fit perfectly and are stronger than the originals.Great, very bright ans visible. Much better then the stock carbon one in terms of visibility, though cant tell you yet if it's as durable. Dimensions exactly the same, fits perfectly.The quality of the fins is great! These fit well on my 600 with 550 horizontal fin mount. I haven't flown it yet but they seem very well visible.