<https://www.concretesleepers.sydney/products/plain-smooth-concrete-ufp>
<http://schema.org/description>
"UFP’s (Under Fence Plinth’s) are used for filling in the gap under a good neighbor fence. The ends are tapered to fit into the 50×50 steel post of the good neighbor fence. We recommend a maximum of 2 UFP’s high (400mm high)."
<https://www.concretesleepers.sydney/products/plain-smooth-concrete-ufp>