... and no radiation 1-3mm ,1-3.5mm Safety-Color Ceramic AggregatesUse:They are for highways, airports, airport runway ... environmental decay resistance, no radiation, low water absorption, bright color, high-grade appearance, never fade, hard solid, long ... , high hardness, wear resistance, good performance, slippery body color, rich color, never fade.Shape:For irregular granular appearanceSize1-3.5mm or ...