Big nuts have come a long way since the days of the Hexcentric; gone are the clunky, heavy beasts of old. Nowadays we have a
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These Bi-focal corrective lenses can be inserted into the M-28 Geminus, TM-7500 Splendive II & M-40 Splendive IV masks. Available in 0.5 diopter increments from 1.0 to 4.5 for left & right lenses.
Sold individually