Flipper holds four lenses. Each lens has its power marked on its surface. Furthermore, it has adjustable PD scales which are engraved as well as color painted. Flipper comes in a sturdy case. 

Specifications:
Available in ±0.25D, ±0.50D, ±0.75D, ±1.00D, ±1.50D, ±2.00D
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Model Number Not Applicable
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