... a group of very expertise working teamPebble diamension: 10-20mm, 20-40mm, 40-80mm or as customer’s requirementPebble Grade: Exellent gradeSurface ... stone3UsagePaving, landscaping, building,home decoration and so on4Available size10-20mm, 20-40mm, 40-80mm and so on5Available colorBlack, white, yellow, white, mixed ...