... 20pcs/ctn, 17.5/16kgs Purpose: ENT diagnostic set is designed for doctor's medical check eyes,ears, ... ,-30WG-III,Diopter compensation: ±1,±2,±3,±4,±6,±8,±10,±15,±20,±25,+40WG-IIIE,Diopter compensation ... XPC,Diopter compensation: ±1,±2,±3,±4,±5,±6,±8,±10,±15,±20,±25,+40Although ear specula' ... varies,it still can be installed on otoscope easily.Axis of 3-times magnified glasses is nearly coincided with axis ...