... years experience in stone producing and stone trading. Products Size:Shanxi Black Granite Tile: 305x305x10mm, 500x500x20mm, 600x600x20mm, 600x900x20mm, 800x800x20mm, 900x900x20mm, 1000x1000x20mm ... Countertop: 2500x620x30mm, 2400x610x30mm, 2400x1220x30mm or 2500x1220x30mm, (1800-2500)x900x30mm etc.Shanxi Black Granite Stair Step: 33x100x3cm, 15x100x2cm, 33x110x3cm, 15x110x2cm, 33x120x3cm, 15x120x2cm, ...