Glass Beads is produce by tianjin gangde industrial and trade CO., LTD in, that is a factory with very strong real strenght, and the product is numerous. A section of this company to start producting road mark line using reflection beading from 2002, that company has passed ISO 9001& and 14001 attestations, Korean KSL2521 standard attestation, the attestation of EU CE. That company can produce product Match international standard Such as :Chinese JT/T446-2001 standard, Korean KS L2521-2006 standard, the AASHTO M247 standard, BS6088 standard, EN standard at inside of almost any standard of nation.We are this company international market business agents and carry on an international market development for it.We promise the quality first and the price first of our products physical reference appearance : colorless and transparent ball, no visible bubbles and inpurity density: 2.4-2.6g/cm3 roundness: >=80% refractive index: 1.5-1.6 composition: Sio2>68%