black granite memorial 1. Characteristic: Density: about 3.5g/cbm-4.5g/cbm Water absorption: 0.04% Bending strength: 37.6Mpa Compressive strength: 259.7Mpa. Brightness: over 92. Polishing degree: over 100 degree.
2.Tolerance of thinckness: 1cm: +/-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.common packing: plastic film and foam inside and strong wooden crate outside. 5.Usage: cemetery, memorial, garden. 6.prodece progress: Material→cut to size→polish→bundle→packing
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