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Levenhuk ED-2x Barlow Lens – Buy from the Levenhuk official website in USA
Tele Vue 2X Barlow for 1.25" eyepieces | Astronomics.com
Tele Vue 1.25" 2x Barlow # BLW-2125
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Levenhuk 2x Barlow Lens – Buy from the Levenhuk official website in USA
2X Barlow Lens For SM and SW Stereo Microscopes (48mm) – AmScope