Model 935 3-Step Colposcope. Includes: three step turrent magnification changer.300 working distance objective lens 3X,7X 17X magnifications 12.5X eyepiece with diopter locks and fold down rubber eyecups for eyeglass wear. Straight binocular head f=160. Fan cooled dual support variable optic coaxial illumination with 15V 150W lamp. Dual port feature allows quick change from one lamp to another resulting in an interrupted procedure. Maximum high from floor objective lens - 46 inches. Maximum height - 34 inches.Green filter in selector knobs diameter base on roller castors. Spare lamp and dust cover.LIMITED LIFETIME WARRANTY.