... Inspection Regulations, which cover color, size thickness tolerance,workmanship, surface treatment, packing way, crate, gaps, inspection rate etc., ... you requiredcolor: black, gray, green, rusty, dark grey / surface finish: natural, can be with holes6. Slate Irregular Random Stone ... , the producing capacity is around 2000-3000m2 for low season, 5000-6000m2 for midseason of each single item. We have ...