Cole Safety Products High Index Standard Type 3 Reflective Glass Beads 1 Pound Size: US Mesh 180-250 microns, 98% roundness Refractive index 1.93 Uses include topical paint applications, traffic safety, signs,art and craft projects. Manufactured using virgin glass! 5 times brighter than Standard DOT glass beads Sugar like consistency. Shipped in a resealablebag.