... Polishing degree: over 100 degree.2.Tolerance1cm: +/-0.5mm; 1.8cm: +/-1mm; 2cm: +/-2mm;3.Material:black granite, China black granite, Shanxi black granite ... , Hebei black granite, mongnlia black granite and so on.4. ... styles; and divided into Apex, Book, Canopy, Cross, Diamond, Heart, Kerbset,with flower bed, Ogee, Oval, upright ...