Features<br> High Light Transmittance and Refractive Index: The lens is coated, has high light transmittance and high refractive index, making the image brighter and clearer.<br> Standard and Universal: The screw interface size is the international standard RMS size, which can be used by 95% of professional biological microscopes on the market.<br> Brass Material: Microscope objective len made of brass material with exquisite workmanship, this objective is corrosion resistant, can no worry about falling down.<br> Chrome Plated Shell: The shell of the microscope objective is chrome plated, which is stable and durable features, can use for long time.<br> Application: This microscope objective as the important fitting of microscopes in laboratory, mainly used for microscope magnification to observe objects<br> Specification:<br> Item Type: Achromatic Microscope Objective<br> Material: Brass<br> Model: 4/0.10<br> Use: Microscope Accessories<br> Interface Size: Approx. 20.2mm/0.8in (International standard RMS size)<br> Magnification: 4X<br> Numerical Aperture: Approx. 0.10mm<br> Cover Glass Applicable Thickness: Approx.0.17mm<br> Microscope Applicable Mechanical Tube Length: Approx. 160mm/6.3in<br> Working Distance: Approx. 0.13mm<br> Common Rail Distance: Approx. 195mm/7.7in<br> Parfocal Distance: Approx. 45mm/1.8in<br> Package List:<br> 1 x Achromatic Microscope Objective<br> 1 x Storage Bottle<br> Package List<br> 1 x Achromatic Microscope Objective<br> 1 x Storage Bottle<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin