G40-04 G4004 Castroviejo Eye Speculum 3 3/4" G18-332 G18332 Castroviejo Eye Speculum 3 3/4" Small 13X5mm O.D G18-331 G18331 Castroviejo Eye Speculum 3 3/4" Medium 15X5mm O.D G18-330 G18330 Castroviejo Eye Speculum 4" Large 18X5mm O.D