Amazon.com : Telescope Barlow Lenses Kit 2X-3X-5X, 1.25 Inch Telescope Accessory, Fully Metal Multi Coated Broadband Green Film Barlow Lens for Telescope Astronomy Eyepiece : Electronics
APM Telescopes. Skywatcher 3x Barlow Lens 1.25" with 3 lens elements
Astromania 2" ED 2x dual power Telescope Barlow Lens for Telescopes
Amazon.com : Orion 1.25" Shorty 2X Barlow Lens and Camera T-Adapter : Electronics