2X Auxiliary Objective Barlow Lens for SZ0702 Zoom Stereo Microscope (48mm) | Boli Optics Microscope Store
AmScope 2X Barlow Lens For SM and SW Stereo Microscopes (48mm) - Walmart.com
KiZHXlo Monocular Microscope 40X-1600X Magnification with Barlow Lens for Students Adults, Dual LED Illumination, with Science Kits Beginners Microscope Includes Phone Adapter - Walmart.com