The external thread diameter is 20mm. The pitch is 0.705mm. (b) Through no fault of our deliveryman, they are not able to unload or deliver the item (such as there being no person to assist if the product is large or heavy). We only accept the return for original package. Please make sure the item have NO man-made sabotage.All products are rigorously tested before leaving the factory, if products received damaged or with quality problems, please do not hesitate to inform us with a photo that can be used as evidence. We are always looking to bring new and innovative items to our catalog, so contact our Customer Service department with any suggestions you may have! The item "Long Working Distance Plan Achromatic Metallurgical Microscope Objective Lens" is in sale since Tuesday, August 14, 2018.
This item is in the category "Toys & Hobbies\Educational\Science & Nature\Microscopes & Chemistry". The seller is "outdoor2015" and is located in , . This item can be shipped worldwide.