ITEM NAME:Metal 3X Barlow Lens for 1.25-inch Astronomy Telescope Eyepiece Optical Glasses Description: 3X magnification with 1.25 inch interface increases the magnification of any 1.25 inch eyepiece and also can provide comfortable viewing. It allows you look more closely and more detailed at the moon's surface and other planet. Multi coated optical lens offers a high quality observation without additional additional chromatic aberration, and making image more clear and sharp. Providing more magnification without reducing the exit hole on the eyepiece and keeping a comfortable observation with wide view. Easy to Use: Simply insert the eyepiece into Barlow lens, and then insert the Barlow lens into the scope. Specification: Interface: Approx. 1.25 inch (31.7mm) Magnification Factor: 3X Material: Metal + Optical Glass Color: Black Weight: 49g Height: 65mm Package Includes: 1 Piece 3X Barlow Lens SKU: ALU0016456277003589.Easy to Use: Simply insert the eyepiece into Barlow lens, and then insert the Barlow lens into the scope. 1 Piece 3X Barlow Lens. Magnification Factor: 3X. Interface: Approx. Weight: 49g.