Material: Brass,Glass Size: 3 inch Approx Color: Green , Gold Finish: Shinny Brass 2X magnification and 25mm Large Objective Lens increases light transmission and delivers more bright. The application of the Opera glass is very widely such as visiting horse and car races,going to the circus, watching sports meeting,or enjoying opera and so on. 25mm Objective Lens and 2X theater binoculars with optical glass enhance image clarity, which can bring the scenery detail to your eyes. Opera binoculars with center-focus knob, even a can focus easily.