... Certificate:CE & ISO9001, 2000 3.Usage: garden decor, pond accessories, fountain 4.own factory Garden decorative grey pebble stone on net 1 ... 35-40,40-50mm etc.Finishpolished,honed,naturalUsageFlowerpot,aquarium, garden,sidewalk,plaza,parkIndoor and outdoor decoration,or paving,building ... am looking forward to your inquiry. 2.Referenced photos: Garden decorative grey pebble stone on net