All 20 images are actual red brick, just from different angle. In some, there are multiple red bricks, like small wall.

This is for client and i know that he will not write alt tags for each product nor will i.

Thanks for quick response, i will give all options to client. At the end it is he's decision to make.

So my client red about SEO and now he needs alt tags for each image on website.

There is like 200 products and each product has 20 images, i know he will not write alt text for each and there isn't that much to write (them are selling bricks).

So can all 20 images with in product page contain the same alt tag (product name)?

Example: alt="red brick". Wount google ban website for that?

Mybe better way would be alt="red brick 1", alt="red brick 2" and so on.