Design controls water turbulence by allowing wave energy to be dispersed along the length of the lane creating the optimum environment for a swimmer's fastest times. Each lane consists of a series of polyethylene disks ,donuts etc strung on a vinyl coated, 3/16" stainless steel cable. Comes completely assembled. To meet regulations for competitive swimming events, each 15' end portion of the racing lane is required to be solid color with alternating colors available for the body of the racing lane. For non-competitive usage of racing lanes, a different color scheme may be preferred. Please specify.