Tele Vue 2x Barlow Lens (1.25") BLW-2125 B&H Photo Video
2x - 1.25" -- Omni Barlow Lens
Omegon 2x Barlow lense, achromatic, 1.25"
Celestron X-CEL 2x Barlow Lens -1.25 93529 B&H Photo Video
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 : 1.25 Inch 2X Barlow Lens, Barlow Lens for Astronomy Telescope Monocular Eyepiece 31.7mm : Electronics
Omni 1.25" 2X Barlow Lens (93326) – Cloud Break Optics