75. Grating ?? New Construction ?? DIY ??

Thank you for looking! ^ ^
This is a grating for U-shaped ditches that I purchased when my house was newly built.
I used it for about 2.5 years, but it's no longer needed due to a city plan for new installations, so I'm selling it.
It was used outdoors. It was also placed in an area where cars were driven in and out.
There are some parts with concrete attached.
Please only purchase if you understand this.

I'm not an expert, so I don't know the details, but please check the photos for size and other information. ^ ^

This is the price for one piece.
I have 5 pieces in total.

I am located in Miyagi Prefecture. If you are able to pick it up, please let me know in the comments.