Compared with the square hole structure of ceramic blocks , hexagonal hole structure has six 120 degree angles, smaller curvature of corners, smaller back pressure, 14% lower pressure drop, larger heat exchange area, higher heat exchange rate, flow efficiency can be increased by 15%. More walls, more uniform structure, better to heat exchange and resistance to silicon, iron and other impurities erosion and clogging. Hexagonal hole structure represents the densest filling structure per unit area. Relative to square holes, 15% more holes can be added with the same inscribed circle radius. Compared with the square hole, 72% more heat exchange contact points significantly improve the conduction efficiency. Other hole shapes of ceramic blocks are also available in our company: quare, rectangle, rotundity, triangle, and others your requested