The base of the middle column umbrella is 42x42x5.8cm 38-48mm

▸ Material composition: natural granite substrate
▸ Mohs hardness: 6-7 grade
▸ Density range: 2.6-2.8g/cm³
▸ Regular thickness: 20/30/50mm
▸ Surface treatment: polished/fire-burned/lychee