3X-100X Binocular Zoom Stereo Microscope with Ball Bearing Dual-arm Boom Stand
Features: Total 3X - 100X zoom stereo magnification High quality widefield eyepieces 10X and 20X with diopter regulator 0.5X auxiliary lens included 223mm ( 8-3/4" ) long working distance and 80 mm ( 3-1/8" ) field of view All metal boom stand with ball bearing, heavy duty and moving smoothly