Umqolo ophindwe kabini iibheringi ezine tapered zinezakhiwo ezibini. Iringi yangaphakathi ephindwe kabini kunye nomzimba oqengqelekayo kunye nendibano yekheji, ukubunjwa komsesane okubini okwahlulayo. Uhlobo lweringi yangaphakathi ephindwe kabini kunye nomzimba oqengqelekayo kunye nendibano yekheji, ukwakheka komsesane okuphindwe kabini komdyarho wangaphandle.