Features: 1. Aluminum Alloy shell is accuracy machined, stable and durable for long time use. 2. This is a 60X achromatic objective lens for biological microscope. 3. It can eliminate unwanted reflections and increase contrast. 4. Offers high quality observation without additional chromatic aberration, make image more clear. 5. The Length of the objective lens is 38.2mm, easy to use. Specification: Item Type: Achromatic Objectives Lens Material: Aluminum Alloy + Optical Lens Color: As Pictures Show Magnification: 60X Tube Length: Approx. 160mm / 6.3inch Conjugate Distance: 185 Cover-glass Thickness: Approx. 0.17mm / 0.007in Objective Lens Length: Approx. 38.2mm / 1.5in Mounting Size: Approx. 20mm / 0.79in（Standard RMS Thread) Item Size: Approx. 5 x 5 x 5cm / 2.0 x 2.0 x 2.0inch Package Weight: Approx. 43g Package List: 1 x Achromatic Objectives Lens Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. 1、Aluminum Alloy shell is accuracy machined, stable and durable for long time use 2、This is a 60X achromatic objective lens for biological microscope 3、It can eliminate unwanted reflections and increase contrast 4、Offers high quality observation without additional chromatic aberration, make image more clear 5、The Length of the objective lens is 38.2mm, easy to use