Cole Safety Products High Index Reflective Micro Powder Beads 1 Pound Size: US Mesh 35-45 microns, 98 % roundness Refractive index &gt; 1.93 Uses include topical paint applications, traffic safety, signs,art and craft projects. less than 1% inclusions, Manufactured using virgin glass! Fine Powder like consistency. Shipped in a resealablebag.