Na-ewebata mgbakwunye ọhụrụ anyị na ahịrị ngwaahịa ngwaike anyị, njikwa ngwaike na-egosipụta ịdịmma dị elu, okomoko na ịma mma niile n'otu ngwugwu.Emere ya na ihe zinc alloy, aka a na-anya isi ọ bụghị naanị ịdịte aka na ike kamakwa ọ na-adọrọ adọrọ anya nke na-echetara amara na ịdị ebube nke nnụnụ roc.