NDS® Dura Slope™ is a 6-5/8 in W, 48 in L trench drain system with a built-in slope of 0.7%. N sections are non-sloped and used to extend the length of the system. Each channel section is molded of gray structural foam polyethylene with UV inhibitors 4 in ID with a 2 in radius bottom. LeveLoc re-bar supports with integral protruding knob levels channel and grips re-bar. ProFit locking system locks grate to integral frame and supports product during installation DuraLoc integral joint lock prevents joint movement during installation, no extra clamps or screws needed. Interlocking tongue and groove joints and bottom outlet on each channel section 0.7% built-in slope.