Specialised 24 ft recall lead in British made quality material. This is the classic way to teach recall, it is far better if you use a whistle in conjunction with this technique. This should be an acme whistle (see my products). It carries further and stronger than the human voice. More importantly, it is far more commanding and does not sound emotional and panicky. which the human voice can impart. Approx 24ft long made from ultra strong canvas material, Instructions on recall and techniques included.