Roof gutters must comply with the NEN-EN 612 standard. NedZink standard prefab roof gutters are produced in a standard length of 3 meters. Depending on the type of gutter, different lengths of up to 6 meters can be supplied on request. Non-standard prefab gutters are produced from sheets of NedZink material according to drawings supplied by the installer. Non-standard prefab gutters must also comply with NEN-EN 612.