[Specification]: 4X20 with cross aiming
[Magnification]: 4 times
[Objective lens diameter]: 20mm
[Pipe diameter]: 19 mm
[Full length]: about 270mm
[Exit pupil distance]: 70-85mm
[Material]: plastic steel
[Lens]: 100% all optical glass
[Focus fine tuning]: Feasible
[Alignment adjustment]: feasible (up and down, left and right buttons can be adjusted)
[Product content]: one set of mirror body, one manual, one set of mirror cover, color box support fixed on the mirror body