Wide-angle telescope eyepiece set for 1.25" (31.7 mm) barrels, offering a 68° field of view. Focal lengths included: 6 mm, 9 mm, 15 mm and 20 mm (approx. 0.24 in, 0.35 in, 0.59 in and 0.79 in). Suited for monocular/binocular setups to broaden viewing angles. Brand: svbony.