MJ Metals Jewelry White Tungsten Carbide Polished Center Tiled Wedding Band 4mm Ring Scratch Resistant. Mirror Finish Cobalt Free AND Comfort Fit. Nickel used as a binder If it is not stamped "WHITE TUNGSTEN CARBIDE" inside, then it isn't FREE SHIPPING, Select Metals Jewelry if you are not a Prime Member---&gt; To have this item laser engraved on the inside with your personal message please select size and then "ENGRAVED" from the drop down menu