Manufacturer Part Number: 14-161-4|Lens Type|TripletNumber Of Magnification Levels|Minimum Magnification|30xLens Diameter|0.8281 in; 21.03 mm; 53/64 inMaterial|Lens Diameter (mm)|0.8281 in; 21.03 mm; 53/64 inLens Diameter (Decimal Inch)|0.8281 in; 21.03 mm; 53/64 in; 0.8281; 53/64Focal Distance|Field Of View|Features|Hand-Held Magnifier; Magnifiers Lenses Made of 3 Precision Ground ElementsStandards|Number of Lenses|1Folding|YesLight Source Included|NoFocal Distance (mm)|Focal Distance (Inch)|PSC Code|UNSPSC Code|41111714