Magnification: 4XNA: .10Optical Working Distance: 29.04mmThread: RMSMechanical Tube Length: 160mmCover Glass Thickness:0.17mmColor Correction: achromaticField Correction: planImmersion Medium: noneNosecone: fixedAdditional Information:Objective-Iris: Without IrisObjective-Mounting Size: 20mmOptics: PlanObjective Power: 4XObjective-Type: Compound Brightfield DarkfieldColour: silverMaterial: metalPackage Contents:1 x achromatic Objective LensOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days.When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specificationsWe want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''t hesitate to contact us. We are here to help and will do our best to assist you.Thank you for choosing our product. We hope you enjoy it