... /ctn, 20pcs/ctn, 17.5/16kgs Purpose: ENT diagnostic set is designed for doctor's medical check eyes,ears,nose ... 's diameter varies,it still can be installed on otoscope easily.Axis of 3-times magnified glasses is nearly ... check better.Endurable and sound conductive battery handle.1.Ophthalmoscope2.Otoscope Carrier3 .Ear Specula (3,4,5,6mm Diam) ... Power Supply:1.5V x 2 "C"Type ENT Diagnostic Set WG-I