The shell was made of quality metal, anti-deformation, anti-rust, sturdy and durable. 1.25 inch 3x Barlow lens, fully multi-coated metal with M42x0.75mm thread camera connect interface for telescope eyepieces. High quality 3X Barlow Lens gives a big magnification boost to all 1.25 inch eyepieces. The barlow lens also could offer more magnification without reducing the exit pupil on the eyepiece.
