Mpempe akwụkwọ ahụ ga-enwe akụkụ ndị a bụ isi:a) plastic nutb) mgbanaka mkpalic) Ozu oghere nwere oghere oghered) Mgbochi
Ntụkọ kọntaktị ọla kọpa nwere nickel na-akpụzi ozugbo ka ọ bụrụ ebe nchekwa nwere mgbanaka O maka ezigbo akara mmanụ.