Inlay, 10 pc 6mm Dot Set Nice Inlay Set, Extra Thick Acrylic material (plastic). Mostly Black Material Nice Inlay Set, Acrylic material (plastic). Specifications: 10 Piece Acrylic Fretboard Inlay Dot Set 6mm finished diameter 2.98 mm Thickness (just over 7/64" less then 1/8") This product is tapered on the side, it is 6mm finished size tapered to a slightly larger face size allowing a very clean tight fit after sanding to the fret board. This allows for good gluing and finsh sanding to a clean edge. Part dimensions are: 6mm on finished inset side, slightly large on tapered face to allow for a tight fit after finish sanding. 7/64" overall thickness (2.98 mm) Nice inexpensive inlay set.