This is a 3.5X-180X zoom magnification trinocular stereo microscope head. It includes two Barlow lenses (0.5X & 2.0x), two pairs of super widefield high-eyepoint eyepieces (10X & 20X) and foldable eyeguards. It comes with 45-degree inclined 30mm eyetubes with diopter. Its trinocular port enables to add photo or video capability. The microscope provides sharp clear erect stereo images over a large zoom magnification range. Its super 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 $1250.