Wholesale volcanic stone double-sided grinding foot stone grinding foot tool rope wrapped oval grinding foot stone

Wholesale volcanic stone double-sided grinding foot stone grinding foot tool rope wrapped oval grinding foot stone 

Volcanic rock is characterized by many pores, light weight, high strength, heat preservation, heat insulation, sound absorption, fire prevention, acid and alkali resistance, corrosion resistance, no pollution and radioactivity. It is an ideal natural green, environmental protection and energy-saving raw material.