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Family ID The Family ID is used to identify product family presentations and can be used to quickly access presentations utilizing the search. #1770

Lens Diopter Gauge

Precision optics gauge will not scratch glass lenses. Measures positive and negative lenses 21mm diameter and larger. Directly reads curvatures from 0 to 17 diopters in ¼ increments. 2" diameter gauge. Values based on the index of 1.5.