Diagnostic E.N.T Kit Pin Contact Fitting System Otoscope head: Pin contact fitting system chrome plated fix magnifying lens plastic specula1, 2, 3mm included. Bent arm illuminator chrome plated tongue blade holder and two laryngeal mirrors no, 4 and no, 5 nasal speculum chrome plated. Battery handle require C batteries chrome plated. Rheostat for adjustment of illumination replacement bulb: 2.5v. The diagnostic set in supplied soft storage case.