3x25(A) with chain opera glasses 1),magnification:3x 2),aperture:25mm 3), ... ,optical lens (anti-reflection blue coating)lens systermGalileomaterial metal ,plated in gold or silver, optical lensFocusing system center item size(LxWxH ... .W. 12kgN.W. 10.5kg plated golden or silver 3x25(A) with chain opera binocular glasses