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Hollis Corrective Lens to suit M3 Mask - Left
Hollis's own brand Negative Diopter lenses, for the left side of the M3 Dive mask. To correct a diver's vision, in the same way, that glasses would.
Diopters range from -1.5 through to -8.0
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Diopters range from -1.5 through to -8.0