Celestron 2X Omni Barlow for 1.25" eyepieces | Astronomics.com
Amazon.com : SVBONY 2X Barlow Lens, Doubles The Magnification Telescope Barlow Lenses, 1.25 inch Multi Coated Broadband Green Film Telescope Accessory with M42 Thread for Standard Telescope Eyepiece : Electronics
Amazon.com : SVBONY 2X Barlow Lens 1.25 inch Double The Magnification Multi Coated Broadband Green Film Telescope Accessory with M42 Thread : Electronics
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
Carl Zeiss 1¼" Abbe Barlow lens 2x
Levenhuk ED-2x Barlow Lens – Buy from the Levenhuk official website in USA