Cast Stone Pier CapHere at Double L we manufacture one of the largest ranges of pier caps in Ireland. *The Cast Granite and Cast Portland are made from white granite sand, white granite chippings, white cement and ribbed steel rebar . *The Cast Sandstone pier caps are made from brown sandstone sand, granite 3mm chippings, white cement and ribbed steel rebar. Our collection is guaranteed to suit the majority of piers but we also have the design and manufacturing