Yonex LEAGUE 7 Tournament Practice ShuttlecocksLEAGUE 7 Yonex has been meticulously hand crafting the best feather shuttlecocks in the world since 1965. Each of our shuttles is assembled by a team of expert craftsmen using the finest materials. They are then individually tested to make sure they deliver consistent flight trajectory, accuracy and distance at all temperatures. Thats why the best players and the biggest tournaments in the world choose Yonex shuttlecocks. Temperature Grade 33C and