This is a 6.7X-90X zoom magnification binocular stereo microscope head with ultimate optical system, offering top-level sharp clear erect stereo images over a large zoom magnification range. It includes a 2.0X Barlow lens and a pair of extreme widefield high-eyepoint WH10X/22 eyepieces with foldable eyeguards. It comes with 45-degree inclined 30mm eyetubes with diopter. The extreme widefield optics and high-eyepiont design ensure an easy and comfortable observation. This microscope head fits all the stands with a 3" (76mm in diameter) O-ring holder. It is made by the same technicians and on the same production line that makes optical instruments for Leica, Zeiss, Nikon and Olympus. It is brand new in factory box. Its retail value is $2200.