Feature:1. HIGH PERFORMANCE: The objective lens has coating treatment, with high light transmittance and refractive index, and the image is brighter and clearer.2. SPRING DEVICE: With spring protection device, the cover glass can be automatically rebounded when it is observed to avoid crushing the specimen.3. DURABLE MATERIAL: Made of excellent brass material, and the shell is chrome plated treatment, with fine workmanship, corrosion and drop resistant.4. STANDARD INTERFACE: Adopt international standard RMS size 20.2mm screw interface, which can be used by most professional biological microscopes.5. 100X MAGNIFICATION: The microscope objective lens has high power 100X magnification, the numerical value is accurate, and the operation is convenient.Specification:Item Type: Objective LensModel: 100/1.25Material: BrassUse: Microscope accessoriesInterface Size: Approx. 20.2mm / 0.8in (international standard RMS size)Magnification: 100XNumerical Aperture: 1.25mmCover Glass Applicable Thickness: 0.17mmMicroscope Applicable Mechanical Tube Length: Approx. 160mm / 6.3inWorking Distance: 0.13mmImpregnation Medium: Cedar OilSpring: Yes (automatic rebound)Common Rail Distance: Approx. 195mm / 7.7inParfocal Distance: Approx. 45mm / 1.8in.Package List:1 x Objective Lens1 x Storage Box