Ko te whao ahi he momo whao pou marama me nga mokowhiti porowhita e kore e pai ki te whakamahi titi.He momo whao karekau me nga mokowhiti porowhita pokanoa.Kei roto i te nuinga o te waa he whao me te upoko whao, kei waenganui o te upoko whao ka whakaturia he poraka kaha, ko te poraka kaha he porotakaroa papatahi, te diameter o te poraka kaha me te diameter o te whao whao, te poraka kaha me te Ko te upoko titi e honoa ana e te mata maeneene, i roto i te whao ka whakatakotoria he mokowhiti porowhita, i roto i te whao whao i waenga i te mokowhiti porowhita me te mahunga whao ka whakatakotoria he mowhiti ma kirihou.