Description: Our ditch channels are a well tried and tested glass reinforced cement unit (GRC) in 98cm lengths with drainage holes. It is quick to install and easy to handle. They have been on the market for over 20 years. Four corner units are available to complete the set. It is manufactured by the spray-mix method of GRC production. A complete set comprises of 155 straight lengths and 4 corner sections. Four spare lengths are supplied when ordering a full set. The spray mix GRC is a form of manufacture which provides a HIGH IMPACT STRENGTH material by comparison to cast moulding. Insist on a spray-mix GRC for an altogether stronger unit. This unit has been successfully installed throughout the country. Standard supply for a green 40 metre square green.