Feature 1Feature: 38mm to 27.2mm inner thread adapter, suitable for trinocular stereo microscope lens transfer, to meet the needs of work. 2Parameter: The outer diameter is 38mm, the inner diameter is 27.2mm, with exquisite workmanship, stable and reliable performance, long service life. 3Durable 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. 4Ideal Replacement: Professional and practical design with beautiful appearance, easy to carry and use, great replacement for the broken one. 5Application: The trinocular stereo inner thread adapter is wide applicable for laboratories, schools, teachers, sample observation, eyepiece protection, etc.SpecificationItem Type:TrinocularStereoInnerThreadAdapterMaterial:Aluminumalloy .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; }Size:Outer Diameter: Approx.38mm/1.50inInner Diameter:Approx.27.2mm/1.07inPackage List1 x TrinocularStereoInnerThreadAdapter