... available upon request; 3. Normal thickness: 2cm, 3cm and ect.; 4. Finish: Polished, honed, flamed, sandblasted ... etc.; 5. Packing: Fumigated wooden crates; 6. Quality control: Polished degree: More than 85 degree, as ... tolerance: +/-1mm, +/-1.5cm or +/-2mm, The quality requirements must be comfirmed by customer. Welcome to inquiry ... , monument, etc Natural stone stair treads with low price and A grade