ObjectiveGrouped From Any Two Objectives of 1X,2X,3X and 4X,Working Distance1X-55mm,2X-81mm,3X-61mm,4X-57mmWide Field Plane-Scope EyepieceWF10X,WF15XOptionalTotal Magnification10X-20X,or 10X-30X,or 10X-40X,or 20X-30X,or 20X-40X,or 30X-40XArticulated Free Binocular Head,Interpupillary Distance55-75mm,45º InclinedIlluminationTop/ Bottom Light12V/10W Halogen Lamp,with Ø95mm Frosted Glass Stage PlateRack and Pinion Coarse Focusing Mechanism With Slip Clutch and Tension AdjustmentNet Weight/Set2.4kgPackage4 Sets/Carton61X35X36cmGross Weight/Carton11kg