2X Barlow Lens For SM and SW Stereo Microscopes (48mm) – AmScope
Celestron X-CEL 2x Barlow Lens -1.25 93529 B&H Photo Video
Amazon.com : Barlow Lens 2X, Bysameyee 1.25 Inch Fully Multi-Coated Metal Barlow Lens with M42 Thread Camera Connect Interface for Telescope Eyepiece : Electronics
Apertura 2" ED Barlow Lens | 2X Magnification | High Point Scientific
Levenhuk ED-2x Barlow Lens – Buy from the Levenhuk official website in USA