Amagilavu alahlwayo enziwe ngezinto ezintsha ze-HDPE, eziguquguqukayo futhi ezihlala isikhathi eside, futhi indawo engaphezulu i-concave futhi i-convex icutshungulwa ukuvimbela ukushibilika.Ukumelana nowoyela, okungeyona ubuthi, akunambitheki, akunangozi kungavimba ukunamathela, ukuvala amagilavu kungavuzi, kungaqiniseka ukuthi kuyasetshenziswa, kuhlala isikhathi eside, kungasetshenziswa ngazo zombili izandla.
