Features The aluminum alloy shell is precisely machined, stable and durable, and can be used for a long time. The length of the objective lens is 31.m, which is easy to use. This is a 10X achromatic biological microscope objective. It removes unwanted reflections and increases contrast. Provide high-quality observation without additional color difference, making the image clearer. Features: -The aluminum alloy shell is precisely machined, stable and durable, and can be used for a long time. -The length of the objective lens is 31.m, which is easy to use. -This is a 10X achromatic biological microscope objective. -It removes unwanted reflections and increases contrast. -Provide high-quality observation without additional color difference, making the image clearer. Specification: Item Type: Achromatic Objectives Lens Material: Aluminum Alloy + Optical Lens Color: As Pictures Show Magnification: 10X Tube Length: 160mm / 6.3inch Conjugate Distance: 185 Cover-glass Thickness: 0.17mm   Objective Lens Length: 31.m Mounting Size: 20mm（Standard RMS Thread) Item Size: 5 * 5 * 5cm / 2.0 * 2.0 * 2.0inch Package Weight: Approx. 55g Package List: 1 * Achromatic Objectives Lens Package List