Omni 1.25" 2X Barlow Lens (93326) – Cloud Break Optics
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
2x - 1.25" -- Omni Barlow Lens
Celestron
Meade Series 4000 1.25" 2x Short-Focus Barlow Lens
Amazon.com : SVBONY 2X Barlow Lens with M42 Thread Bundle with Telescope Camera Adapter Kit for Canon EOS Rebel SLR DSLR : Electronics
Vixen Optics 2x Barlow Lens (1.25") with Built-In T-Mount ES3907