- Thickness:25-45mm - Size:diameter 25-30, 35-40, 45-50cm - Exported to Czech Republic, Japan,etc - Over 10 years experience Natural Decorative Garden Stepping StoneProduct Information Place of Origin Shandong Material Basalt Color Grey Finish Sawn Size (mm) ø250-300, ø350-400, ø450-500 Thickness (mm) 25-45 Used Place Outdoors, Landscaping, Garden, Park, etc. FOB Port Qingdao Port, Shandong ...