... Inspection Regulations, which cover color, size thickness tolerance,workmanship, surface treatment, packing way, crate, gaps, inspection rate etc ... size acceptcolor: black,white,rusty S1120,yellow quartzite P014,green,grey,sesame yellow,pink,mixed color,multicolormaterial: slate, ... 600*300mmor as you requiredcolor: black, gray, green, rusty, dark grey / surface finish: natural, can be with holes6. ...