Nke a bụ tube egbugbere ọnụ egbugbere ọnụ nwere isi okpukpu abụọ, nwere ahụ karama transperent, mgbanaka etiti ojii, ahịhịa ahịhịa, na isi ahịhịa (agba nwere ike ịgbanwe), yana ikike nke naanị 1.5ML n'akụkụ nke ọ bụla, n'ihi na ahụ karama ya dị okpukpu abụọ. oyi akwa ma dịtụ oke, na-eme ka ọ ghara ịdị mfe mgbaji.