1. Clearer Image: This lens is coated with high light transmittance, high refractive index, and brighter image
2. Automatic Rebound: Spring device, automatically rebound when touches cover glass during observation, protect lens from crushing specimen
3. Brass Material: Adopts material, fine workmanship, and fall prevention, exquisite and , chrome plated for shell
4. Application: Interface size is the international standard RMS size, can be used by most professional biological microscopes on the market
5. Basic Specifications: This lens has 60X magnification, common rail distance of 195mm, and parfocal distance of 45mm

Specification:
Item Type: Achromatic Objective
Model: 60/0.85
Material: Brass
Use: Microscope Accessories
Interface Size: Approx. 20.2mm / 0.80in (International Standard RMS Size)
Magnification: 60X
Numerical Aperture: Approx. 0.85mm / 0.03in
Cover Glass Applicable Thickness: Approx. 0.17mm / 0.007in
Microscope Applicable Mechanical Tube Length: Approx. 160mm / 6.30in
Working Distance: Approx. 0.53mm / 0.02in
Common Rail Distance: Approx. 195mm / 7.68in
Parfocal Distance: Approx. 45mm / 1.77in
Spring: Yes (Automatic Rebound)

packing list:
1 x Achromatic Objective
1 x Storage Box