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Tele Science Terrestrial Astronomical Telescope 30/60 Power 30mm Brand New 4893669020023 | eBay
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Phase Contrast Centering Telescope for PH0407 Series Microscope, Diameter 30mm | View Solutions Microscope Store
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Citiwell International OR30 Orbitor Telescope - 30x Magnification, 30mm Optics at TigerDirect.com
