... .5mm; 1.8cm: +/-1mm; 2cm: +/-2mm;3.Materialblack granite, China black granite, Shanxi black granite, Hebei black granite, mongnlia black granite and so on.4. packing1. Very thick plastic rub wraps ... , Diamond, Heart, Kerbset,with flower bed, Ogee, Oval, upright serp, and wing in shape.9.Usage:cemetery, memorial, garden. China black granite headstone designs