... than 85 degree, Thickness tolerance: +/-1mm Color:black,red,grey, ProductBlack Granite Book Style HeadstoneStyleSingle or double upright, Slant maker, ledgers ... kerbing with ledges style, book style, wing & heart style, cross & column styles, etcMaterialPopular color: Shanxi Black,G603,g502,G623,G633,G654 ... and so on. Contact Perston: Sophie ZhouT: 86-13860465793 Black Granite Book Style Headstone