These are surface drains that you install in a 3" deep trench. The 39" long sections click together to the desired total length and they have a grated cover that supports both pedestrian and vehicular traffic.
These were only briefly installed and are as new - we modified our drainage plan and ended up burying a large French drain, as we also wanted to carry away rainfall from our house roof gutter. Priced for sale as one lot (the total retail purchase of 3x 5 units from Amazon was $640, incl. taxes). The photos include one pic of some that were installed (note: not all of them were actually installed).