... no radiation 1-3mm ,1-3.5mm Safety-Color Ceramic AggregatesUse:They are for highways, airports, airport runway ... decay resistance, no radiation, low water absorption, bright color, high-grade appearance, never fade, hard solid, ... irregular granular appearanceSize1-3.5mm or 1-3.0mm Color:green , yellow , red , Packing25 kgs per plastic ... to receive your early inquiry! Safety Color Ceramic Aggregates