NDS DS-097N 4'L x 6" Deep Gray Neutral Dura Slope Channel Drain consists of neutral and pre-sloped sections of trench drain. Manufactured from HDPE, this trench drain offers a durable alternative to concrete channel that will save time and reduce cost at installation. The Dura Slope trench drain system consists of lightweight, modular sections for easier handling and installation and reduced freight to the site. A built-in slope of 0.7% allows optimal flow rates to be maintained system wide; neutral sections are also available.