C-profile parapet duct bottom part for device installation made of PVC to BR 85x170mm light grey. Duct bottom part for the electrical installation duct system parapet duct made of plastic in accordance with DIN EN 50085-1 as device installation duct. With bottom perforation for direct wall mounting and additional rectangular perforation for tool-free fastening of the duct using clip technology on brackets. With C-profile for fastening devices, device installation boxes with quick fastening and partition walls. Couplings for simple and precise duct installation, partition walls and cable retention clips available as accessories. Note: Sound and fire protection measures must be carried out professionally.