This is 1/8" diameter brass plated steel ball chain, with 69 balls per foot. Use it to create fantastic designs in your mosaics! When you grout, the connectors between each ball disappear in the grout & you're left with what appears to look more like a line of little, sparkly beads. It's a very fun way to add texture & a whole new look to your artwork! Hover over the 2nd & 3rd images to see this product used in completed projects.