What you see is a pair of stereoscopic Kpl Wide Field 25mm(10x) high eye relief Zeiss microscope eyepieces. The eyepieces are retrofitted with 1.25" standard size barrels and customized rubber grip. The eyelenses are about 25mm in diameter. The multicoatings are zeiss quality. These eyepieces are light and absolutely stunning on binocular viewers. $195 +sh.