NDS 5 In. x 39-3/4 In. Gray Pro Series Channel Drain5' x 39 3 4' Pro Series channel drain kit. This kit includes the channel, grates, end cap, and end outlet. The patented Pro Series channel is modular and consists of 39 3 4' sections which fit 1 into the other via mechanical interlocking joints. This superior joint will not separate as concrete expands and contracts, like slip fit channel connections. The modular design allows you to reach any length easily, keeping its structural compactness and