Luxury made-to-order furniture company Domkapa is known for their modern, custom-made designer furniture - built to last.  The Domkapa Gram Stools can be found on 1stDibs and Chairish for over $4,000 each new and the lowest I can find per stool online is over $1,000.  We have 5 matching stools - all black matte metal finished with boucle fabric in a dark grey that has some blue to it - it is either the Columbia Graphite Weave or their Columbia Atlantic Weave, both durable boucle fabrics.  
 
All the details on their counter stools may be found here:  https://domkapa.com/en/counter-bar-chairs/gram-counter-bar-chair/  including dimensions and you can scroll down to the Columbia fabrics for a closer look.  These appear to have the Black Textured Steel frames.
 
All are in very good to excellent condition - with minimal signs of any wear at all.  Selling at $345 each and prefer to sell all 5 together.  Rarely seen on the aftermarket.