Multi-layered corrugated conduit with "black-eye" like apertures

A multi-layered corrugated plastic conduit comprising:

• a longitudinally extending multi-layered, corrugated side wall, the side wall comprising at least a conduit inner layer of a first plastic material and a conduit outer layer of a second material, the corrugated side wall including a plurality of transversely extending alternating peaks and valleys, each peak having a peak outermost wall portion extending around the conduit and having a width extending generally longitudinally;
• at least a first longitudinally extending row of apertures defined in the peak outermost wall portions, each aperture being defined by an opening in the outer layer which has a peripheral ring of the first material extending therethrough, the aperture being defined in and surrounded completely by the first material.

A continuously blow-molded, circular corrugated plastic conduit comprising:

• a longitudinally extending corrugated conduit side wall with a generally circular transverse cross section and alternating peaks and valleys extending generally peripherally therearound, each peak having an outermost wall portion extending around the conduit and having a width extending generally longitudinally;
• the conduit side wall including an inner layer of carbon black filled plastic and an outer surface layer of white plastic;
• at least a first longitudinally extending row of apertures defined in the side wall, each aperture being defined by an opening in the outer white plastic layer which has a peripheral ring of the carbon black filled plastic extending therethrough, the aperture being defined in and surrounded completely by the carbon black filled plastic, whereby each aperture defined in the white layer is surrounded by a black ring to provide a black eye like appearance.