Material: Natural Volcano Stone
Shape: LAVA with hole;No pointed particle shape, small resistance to water flow, not easily blocked, uniform distribution  of water and air, rough surface

Color: Natural Red
Size:10-20cm,5-8cm,3-5cm,1-3cm,1-3mm,3-6mm,20-40mesh,40-80mesh,80-120mesh,200mesh,352mesh
Application: Flooring, Paving, Water purity, aquarium