Welcome to our store！</br>1、Feature: 38mm to 27.2mm inner thread adapter, suitable for trinocular stereo microscope lens transfer, to meet the needs of work. 2、Parameter: The outer diameter is 38mm, the inner diameter is 27.2mm, with exquisite workmanship, stable and reliable performance, long service life. 3、Durable Material: Made of hard aluminum alloy material, it has good durability and stability, is not easy to deform, wear, and has a long service life. 4、Ideal Replacement: Professional and practical design with beautiful appearance, easy to carry and use, great replacement for the broken one. 5、Application: The trinocular stereo inner thread adapter is wide applicable for laboratories, schools, teachers, sample observation, eyepiece protection, etc. <p class="wang-edit-text"><p class="wang-edit-text">Item Type:&nbsp;Trinocular&nbsp;Stereo&nbsp;Inner&nbsp;Thread&nbsp;Adapter Material:&nbsp;Aluminum&nbsp;alloy <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> Size: Outer Diameter: Approx.&nbsp;38mm/1.50in Inner Diameter:&nbsp;Approx.&nbsp;27.2mm/1.07in 1 x Trinocular&nbsp;Stereo&nbsp;Inner&nbsp;Thread&nbsp;Adapter Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>