1.25 Inch 2X Barlow Lens, Barlow Lens for Astronomy Telescope Monocular Eyepiece 31.7mm : Electronics - Amazon.com
VIP 2x modular barlow lens, visual and photographic
Celestron 2X barlow lens1.25 inch M42 threaded astronomical telescope accessories _ - AliExpress Mobile
Coronado 1.25" Cemax 2x Barlow Lens
Celestron
2x - 1.25" -- Omni Barlow Lens
Amazon.com : NEEWER 2X Barlow Lens for Telescope Eyepiece, 1.25” Multi-Coated Metal Lens to Double Magnify Eyepieces with M42 Thread to Connect to DSLR or SLR Camera : Electronics
Apertura 2" ED Barlow Lens | 2X Magnification | High Point Scientific
Meade 1.25" Short Focus 2X Barlow Lens
Amazon.com : SVBONY 2X Barlow Lens 1.25 inch Double The Magnification Multi Coated Broadband Green Film Telescope Accessory with M42 Thread : Electronics