We ordered the fishing line for a friend as a gift. The line offered here is available in four lengths and thicknesses: 0.30mm 125m 8.6kg; , 35mm 125m 12,6kg; 0.40mm 100m 15kg; 0.50mm 100m 18kg. Since we have not known about us for strength and length, the string with 0.35mm was ordered. If necessary, we could exchange them at any time. So far, however, this was not necessary. As recommended by an acquaintance was only important that it is made of fluorocarbon. These lines are in the water almost invisible and can not rot or decay. Since they are very elastic elongation, the movements of the fish can be cushioned. Supposedly there are problems here, to feel the movements of the fish. But this question would have to answer a fishing pro. Our friend is a passionate angler. Whether there has been during the attachment, the winding or similar problems, he has not informed us. But that can be a good sign. The guarantee and the guarantee can the cord at any time to return and get the money back. For fans of the watch set is certainly a nice gift. The length or thickness is added when ordering simply in contact. The prices we have compared the Internet. This offer from Amazon with 3.99 was one of the best. The delivery was fast.