Amazon.com : Bresser Barlow Telescope Lens 5X 31.7 mm / 1.25 Inch 3-Element Design and Multi-Coated : Electronics
Mgaxyff Barlow Lens 31.7, Metal Barlow Lens ,Multi-coated 1.25 5X Barlow Lens M42 Thread for 31.7mm Telescopes Eyepiece - Walmart.com
TPO 2.5X APO Barlow Lens - 1.25" | OPT Telescopes
Amazon.com : Barlow Lens 5X, Multi-Coated 1.25" 5X Barlow Lens M42 Thread for Telescopes Eyepiece M42 x 0.75mm Thread T-Adaptor, Can be Attached to DSLR or SLR Camera via a Separate Ring
High Power 5x 4-Element Barlow Lens for 1.25'' Telescope Eyepiece Metal 6923746670181 | eBay