... shipment 5.Exporting experience Pebbles (gravel) filter material, commonly known as the supporting layer filter material or pad filter material, points (natural ... stone)2Material100% natural stone3Usagelandscaping, paving, building, home decoration4Product class rangeunpolished pebble(super class, first class, second class)5Size Range1~3cm, 3~5cm, 5~8cm, 8 ...