ENT Diagnostic Set WG-XP 56x34x32cm, 20pcs/ctn, 17.8/16.3kg Purpose ... ,±4,±5,±6,±8,±10,±12,±16,±20,-25WG-XP,XPB,XPC,Diopter compensation: ±1,±2,±3,±4 ... s diameter varies,it still can be installed on otoscope easily.Axis of 3-times magnified glasses is ... better.Endurable and sound conductive battery handle.1.Ophthalmoscope2.Otoscope Carrier3 .Ear Specula (2.5,3,4,5mm ... 2 "C"Type ENT Diagnostic Set WG-XP