Ray-JrMALL MR.Jiang Training Feather Badminton Shuttlecocks 3pcs 1.Head adopts high quality cork, high-density coil, with special glue for competition, good elasticity, excellent to beat, very durable, not easy to break, ensuring a standard flight and speed. 2.A combination of durable use, stable performance, good hand feeling and fast speed, suitable for training amateur. 3.Thick feather and sturdy rod allow to fall precisely. 4.Speed:76, rotation speed 350-420 rpm. Slice:high quality feather.