ITEM NAME:1.25"/31.7mm 2X Barlow Lens with M28.6*0.6 Thread for Telescopes Eyepieces Description: This 2x Barlow lens to give a big magnification boost to any 1.25" eyepiece it's used with. 2X magnification with 1.25 inch interface increases the magnification of any 1.25 inch eyepiece and also can provide comfortable viewing. Thread interface: M28.6*0.6 pitch. (fine thread) Lens material: pure optical glass lens. Lens coating: Broadband coating. Specification: Interface: Approx. 1.25 inch (31.7mm) Magnification Factor: 2X Lens Material: Pure Optical Glass Lens Sleeve Material: Metal Lens coating: Broadband Coating Thread interface: M28.6*0.6 pitch (Fine Thread) Weight: 12g Total Height: 22mm Package Includes: 1 Piece 1.25" 2x Barlow Lens.Thread interface: M28.6 0.6 pitch. (fine thread). Thread interface: M28.6 0.6 pitch (Fine Thread). This 2x Barlow lens to give a big magnification boost to any 1.25" eyepiece it's used with. 1 Piece 1.25" 2x Barlow Lens.