--Mechanical Tube Length 160mm
--Full coated optical system, with parfocal achromatic objective
 --Anticorrosion stage made by metal 
--Precision rack & pinion focusing system for steady and comfortable operation
--Slip clutch system, allowing the focusing knob to slip and continue turning, protect the focusing system from damage by applying too much force to the knob after it has reached the end. 
  --Adjustable rack stop prevents the objective lens from hitting the slide on  the stage.
  --Metal U-shaped base makes the unit steady, body can inclined 45 degree.
  --Most components of this microscope are made of metal, such as eyepiece, objective, stage, body, focusing system, condenser and etc