... 60mm per piece Weight: 40KG~60KG per square meter Natural cobble stone, River Pebblecolors moreSize: about diameter 30mm- ... PEbag,50bags/ Wooden PalletPebble(Pebble stone,Natural Pebble)1. material :Pebble stone/natural pebbles/river pebble/polished river stone ... picture5.surface:Polished, natural, machine-made, tumbled, crushed. Ect6.shape:Round, oval, irregularity. Ect7.quality:Shiny clean, no dust, ...