Ko ngā peera roera porowhita he peera roera me te rarangi kotahi, e rua rānei o ngā roera āhua-peera e tū ana i te koki ki te tuaka peera. He pai ngā peera roera porowhita mō ngā tono ahumahi taumaha nā te mea ka taea e rātou te whakahaere i te he o te tūnga me te nekehanga o te pou. Ka mau tonu te pumau o ngā āhua o ngā peera roera porowhita, ka taea te tautoko i ngā kawenga radial teitei me ngā kawenga axial taurite.
