Item Type: Objective Lens_x000D_Model: 100/1.25_x000D_Material: Brass_x000D_Use: Microscope accessories_x000D_Interface Size: Approx. 20.2mm / 0.8in (international standard RMS size)_x000D_Magnification: 100X_x000D_Numerical Aperture: 1.25mm_x000D_Cover Glass Applicable Thickness: 0.17mm_x000D_Microscope Applicable Mechanical Tube Length: Approx. 160mm / 6.3in_x000D_Working Distance: 0.13mm_x000D_Impregnation Medium: Cedar Oil_x000D_Spring: Yes (automatic rebound)_x000D_Common Rail Distance: Approx. 195mm / 7.7in_x000D_Parfocal Distance: Approx. 45mm / 1.8in 1HIGH PERFORMANCE: The objective lens has coating treatment, with high light transmittance and refractive index, and the image is brighter and clearer. 2SPRING DEVICE: With spring protection device, the cover glass can be automatically rebounded when it is observed to avoid crushing the specimen. 3DURABLE MATERIAL: Made of excellent brass material, and the shell is chrome plated treatment, with fine workmanship, corrosion and drop resistant. 4STANDARD INTERFACE: Adopt international standard RMS size 20.2mm screw interface, which can be used by most professional biological microscopes. 5100X MAGNIFICATION: The microscope objective lens has high power 100X magnification, the numerical value is accurate, and the operation is convenient.1 x Objective Lens 1 x Storage Box