Super Duo Beads are a Czech made, glass Two Hole Seed bead. Similar in shape to the Twin bead, but with a few very important differences. Super Duos are a pressed glass bead with guaranteed size and dimensional stability. They measure 2.5x5mm, with two .8mm holes . They are not simply coated crystal but actual colored glass with many coating options: Transparent, Opaque, Matte, Color Lined, Picasso, Luster, AB Coating & Magic Line. Over 75 colors to choose from. This 100 gram bag of the Sea Pearl mix contains a moody assortment of blues and greens and creams in an assortment of finishes, representing a misty morning sea.