2032-1-1 Bedrocks Trim-Free Lawn Edging - Gray, tural Stacked Design Bedrock Garden Edging, 10', Slate

There are different products of different sizes. How tall are the stacked stone ones? I need it to hold the mulch in at the bottom of a sloped bed.

How does it hold up against string trimming? Do they start to get wear lines in them?

has anyone tried to paint the grey to add some brown tones? If so, what kind of paint

Does it come with T connectors?