... fade and no radiation 1-3mm ,1-3.5mm Safety-Color Ceramic AggregatesUse:They are for highways, airports, airport ... decay resistance, no radiation, low water absorption, bright color, high-grade appearance, never fade, hard solid, long life and ... time to slow down traffic and pedestrian safety purposes.Function:Avirulent insipidity, corrosion resistance, high hardness, wear resistance, good performance, ...