40X 185 Biological Microscope Achromatic Objectives Lens 160/0.17Features:1. Aluminum Alloy shell is precision machined, stable and durable for long time use.2. This is a 40X achromatic objective lens for biological microscope.3. It can eliminate unwanted reflections and increase contrast.4. Offers observation without additional chromatic aberration, make image more clear.5. The Length of the objective lens is 37.8mm, easy e.Specification:Item Type: Achromatic Objectives LensMaterial: Aluminum Alloy + Optical LensColor: As Pictures ShowMagnification: 40XTube Length: 160mm / 6.3inchConjugate Distance: 185Cover-glass Thickness: 0.17mmObjective Lens Length: 37.8mmMounting Size: 20mmStandard RMS Thread)Item Size: 5 * 5 * 5cm / 2.0 * 2.0 * 2.0inchPackage Weight: Approx. 62gPackage List:1 * Achromatic Objectives Lens