Cable routing duct halogen-free LFH 30x45mm traffic white. Electrical installation duct system Cable routing duct made of halogen-free plastic in accordance with DIN EN 50085-1 for laying cables. Halogen-free plastic is flame-retardant and does not develop any corrosive fire gases when in contact with moisture, e.g. fire-fighting water. This means that electronic devices and material assets are better protected. Duct bottom/top with pre-punched bottom holes at a distance of 125 mm and size 30 x 45 mm with pre-assembled couplings for easy alignment during one-man assembly. Note: Sound and fire protection measures must be carried out professionally.