We offer glass bead. Glass bead is available for different uses, including surface treatment, road marking, reflective, decorative and etc. features (high refractive index glass beads): 1) shape: spherical2) color: white3) specify gravity: 4.10.1gcm34) opacity: 5.0%5) roundness: 95% (min.)6) refractive index: 1.9-1.937) size: 20 - 30 25 - 37 35 - 45 45 - 55 53 - 65 60 - 75 75 - 9090-150um8) various other sizes available.