This is the Hasting Triplet 20x power Magnifier by Bausch & Lomb. The lens diameter is 8.3mm. There are 3 separate lenses which are bonded together to form a compound lens.
Bausch & Lomb - 20x - Hasting Triplet Magnifier #816181
- Brand: Bausch & Lomb
- Product Code: 816181
- Availability: 5
- $68.72
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$54.98