Gosky 0.965Inch Telescope Accessory Kit for 0.965 Telescope - with Four Eyepieces, one Diagonal, a 3X Barlow Lens This six-piece 0.965inch astronomy accessory kit let you get the most out and enhances the performance of your telescope. It contains 4mm/6mm/12.5mm/ 20mm eyepiece, a 2x berlow lens and 90 degree diagonal. 4mm/6mm/12.5mm/ 20mm eyepieces for different power in any telescope. Barlow lens  A visual Barlow, doubles the magnification of any inserted 0.965 inch eyepiece. A 90 degree diagonal.