binocular biological microscopes XSZ-107BN(ISO9001:2008) Double Layer Mechanical Stage Size 140X140mm,Moving Range 75X45mm binocular ... biological microscopes XSZ-107BN(ISO9001:2008) Achromatic Objectives 4X,10X,40X(S),00X(S,Oil) Eyepiece ... /6V20W or 110V/6v20W binocular biological microscopes XSZ-107BN(ISO9001:2008)