We can supply glass beads for road marking ( 160-850¼ m) and large glass bead for rainy night( 1mm-4mm) , refractive rate: 1.93-2.20, Roundness : 75% -95% , and our products have passed CE, ISO9001 and ISO14001 certifications, with an annual output of 5, 0000ton.Application in blasting media and grinding.