DSD COMPOSITE has designed this product to meet the need for high quality, strong FRP drainage channels and grates that can carry large volumes of water efficiently. Regularly we stock this product in 1000mm lengths to suit 100mm--500mm wide Grating (Color Grey). The Channel is manufactured from Fiber Resinforced sheet materials which can withstand corrosion-prone environments. Resin drainage ditch, also known as resin slope protection drainage ditch, is a new type of drainage system. It is made of resin material and has the characteristics of acid and alkali resistance, corrosion resistance, wear resistance, high temperature resistance, and low temperature resistance. It is a substitute for traditional concrete drainage ditches.