Features: - 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: Color: black Lens material: Optical glass Sleeve material: Plastic Interface: approx. 0.965 inch (24.5mm) Length: 6.8cm / 2.7in Weight: approx. 18g Package List: 1 * 0.96" 3X Barlow Lens Package List 1Easy to use: simply insert the eyepiece into Barlow lens, and then insert the Barlow lens into the scope. 2Providing more magnification without reducing the exit hole on the eyepiece and keeping a comfortable observation with wide view. 3Plastic body, lightweight, can stable and durable for a long time use. 4With M42x0.75mm thread to connect digital camera via T ring adapter. 53X magnification with 0.965 inch interface doubles the magnification of any 0.965 inch eyepiece.