Features: 1. Aluminum Alloy shell is preciseness machined, stable and durable for long time use. 2. This is a 4X 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 30.5mm, easy to use. Specification: Item Type: Achromatic Objectives Lens Material: Aluminum Alloy + Optical Lens Color: As Pictures Show Magnification: 4X Tube Length: 160mm / 6.3inch Conjugate Distance: 185 Cover-glass Thickness: 0.17mm Objective Lens Length: 30.5mm Mounting Size: 20mm(Standard RMS Thread) Item Size: 5 * 5 * 5cm / 2.0 * 2.0 * 2.0inch Package Weight: Approx. 41g Package List: 1 * Achromatic Objectives Lens

Offers high quality observation without additional chromatic aberration, make image more clear. [Objective lens length: 30.5 mm] The length of the objective lens is 30.5 mm and easy to use. [Without increg the chromatic aberration] You can enhance the contrast by eliminating unnecessary reflections. Provides high quality observation without increg chromatic aberration and makes the image sharper. [4x color eraser] Aluminum alloy shell is preciseness machined, stable and durable for long time use. This is a 4x achromatic objective for biological microscopes. [High-quality material] This objective lens is made of high-quality material and is durable and durable. Customers can use it at ease.

Power Source: Battery Powered. Objective Lens Description: Achromatic. Brand: Walfront. Item Dimensions LxWxH: 1.97 x 1.97 x 1.97 inches. Color: Gold, Black, Grey. Material: Optical lens + aluminum alloy. Manufacturer: Walfront. Date First Available: March 21, 2019. Best Sellers Rank: #70 in Microscope Lenses. Customer Reviews: 3.4 out of 5 stars 7 ratings 3.4 out of 5 stars. Item model number: Walfrontg3bcig1ye6. : B07PZS6KMV. Item Weight: 0.704 ounces. Product Dimensions: 1.97 x 1.97 x 1.97 inches.