This strap fits the Vivosmart very well, although the cut-out for the button on the side is so high that you have to press hard to depress it. The screws were a bit difficult to assemble just because they are so small. The strap is stiffer than the original, so it's a bit difficult to put on and snap the buckle into the correct slot. The clasp is made of plastic. It looks metallic in the pictures.
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