... Refractive index :ND ≥ 1.93 and ND≥ 2.2, the rate of opacity: ≤ 1%, the rate of the whole roundness: ≥ 95%, ... , hats, bags, life-saving supplies and so on.It has the characteristics of return reflection which resulting strong retro-reflective ... : 26kg/barrel (Volume: 23cm * 23cm * 32cm).The Type and Function of Reflective Powder TypeColorSize(m)NDNYF8120Silver-Grey150-2001.93NYF8130200-3001.93NYF8140300 ...