ITEM NAME:Plastic 0.965Inch 24.5mm 3X Barlow Lens for Telescopes - Accept 0.965inch Description: Easy to use: simply insert the eyepiece into Barlow lens, and then insert the Barlow lens into the scope. Providing more magnification without reducing the exit hole on the eyepiece and keeping a comfortable observation with wide view. Plastic body,lightweight,can stable and durable for a long time use. With M42x0.75mm thread to connect digital camera via T ring adapter. 3X magnification with 0.965 inch interface doubles the magnification of any 0.965 inch eyepiece. Specification: Interface: Approx. 0.965 inch (24.5mm) Magnification Factor: 3X Lens Material: Optical Glass Lens Sleeve Material: Plastic Color: Black Length:6.8cm Package Includes: 1 Piece 0.965" 3X Barlow Lens SKU: ALU0018905177005056.Easy to use: simply insert the eyepiece into Barlow lens, and then insert the Barlow lens into the scope. 1 Piece 0.965" 3X Barlow Lens. Magnification Factor: 3X. Lens Material: Optical Glass Lens. Sleeve Material: Plastic.