|align="center" width="20%" | <!-- Content Column 4 starts here -->
{|style="height:140px"
|align="center" valign="top"| {{Icon|file=ceramic_filter_icon.png|alt=Ceramic filterConcrete Biosand Filter|width=94|link=Ceramic filterConcrete Biosand Filter}}<br> [[Concrete Biosand Filter]]
|}
{|style="height:140px"
|align="center" valign="top"| {{Icon|file=ceramic_filter_icon.png|alt=Ceramic filterKanchan Arsenic Filter|width=94|link=Ceramic filterKanchan Arsenic Filter}}<br> [[Kanchan Arsenic Filter]]
|}
{|style="height:140px"