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Multi-use rule/scale. PD is the distance between pupils, or Pupillary Distance. Plastic scale/ ruler. Comes with a small ready to go plastic container to store ruler in.

- Non- erasable
- Does not scratch lenses.
- Begins with "0" at the outer edge for easy end - to- end readings.
- Scale in millimeters
Dimensions 0.8 x 26 x 170 mm
Weight 3g

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