Cable routing duct made of PVC LF 20x35mm light grey. Electrical installation duct system Cable routing duct made of plastic in accordance with DIN EN 50085-1 for laying cables. Duct lower part/upper part with pre-punched base holes at a distance of 125 mm, from size 30 x 30 mm with pre-assembled couplings for easy alignment during one-man assembly and from size 30 x 60 mm pre-assembled adjustable retaining clips. Note: Sound and fire protection measures must be carried out professionally.