Racing lane's flow-through design controls water tolerance by allowing wave energy to be dispersed along the length of the lane. Creating an optimal environment for the fastest swimming time.Each swimming pool lane rope consists of a series of φ11cm, φ12cm and φ15 polyethylene disks and donuts strung on a stainless steel cable. Each of these disks is designed to rotate independently of the others, thereby allowing the wave energy to be absorbed and dispersed alone, the channel within the lane. Competitor swimming pool lane rope comes completely assembled.