3-5 mm Pumice stone 1-3cm to 10-100cm; natural stone,non-polluting; 3,000mt/month ISO9001-2000 certified ... 4), An ideal natural, green, environmentally friendly products.5), Hole rate: 60%Min.Application:Widely used in ... :2-3MM,5-10MM,10-15MM,30-50MM,50-80MM,80-100MM,100-150MM,150-200MM,etc.Packing ... :25kg/bag ,1MT/bag or according customer's request.Shipping: By container or truck 3-5 ...