Introducing Harrows Marathon F.A.T. Dart Flights Thickest flight ever! Thicker material means longer life and better shaft grip. Ultra Strong and Durable. Transparently Opaque and 125 microns thick! Super tough and super rigid. Marathon F.A.T. by Harrows are 150 micron. Our thickest ever flights for strict 90 degree wing angle. It is an assorted product. Please indicate in your choice you want or you will be sent one at random, subject to availability.