Cole Safety Products High Index Standard Type 3 Reflective Glass Beads 5 Pounds Size: US Mesh 180-250 microns, 98 % roundness, 5 pounds Refractive index &gt; 1.93, Sprinkle on top of wet paint or glue. Uses include topical paint applications, traffic safety, signs,art and craft projects. Manufactured using virgin glass! Highest retro reflective performance!! Sugar like consistency. Shipped in a resealablebag.