Amazon.com : SVBONY 2X Barlow Lens 1.25 inch Double The Magnification Multi Coated Broadband Green Film Telescope Accessory with M42 Thread : Electronics
Apertura 2X ED Barlow Lens - 2" with 1.25" Adapter - 2XB2 - Telescopes at Telescopes
Pros and Cons of Barlow Lenses – ORION BEAR ASTRONOMY
Amazon.com : Astromania 1.25" Latest 2X Barlow Lens MultiCoated Metal with M42x0.75 Thread Camera Interface for Telescopes : Electronics
2X Barlow Lens For SM and SW Stereo Microscopes (48mm) – AmScope
Tele Vue 2x Barlow Lens (1.25") BLW-2125 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
APM Telescopes. TS Optics TSB21 1,5x and 2x achromatic Barlow Lens - 1,25 inch