... very expertise working teamPebble diamension: 10-20mm, 20-40mm, 40-80mm or as customer’s requirementPebble ... pebbles,river stones,stone pebbles 1TypeCobble&Pebble(river stone)2MaterialNatural pebble stone3UsagePaving, landscaping, building,home decoration ... and so on4Available size10-20mm, 20-40mm, 40-80mm ...