4-Mirror, All-Glass Design 4-mirror design allows for comprehensive examination and treatment of the trabecular meshwork with minimal lens rotation Available with a * large ring (28.5 mm) * a small ring (25.5 mm) * 2-position handle (right/left handed) No flange version is ideal for dynamic and indentation gonioscopy Flanged version provides stability for laser trabeculoplasty Mirror Angles : 4 x 64? Image Magnification : 1.0x Laser Spot Size : 1.0x Contact Diameter : 15 mm