Features: 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. Specification: Item Type: Trinocular Stereo Inner Thread Adapter Material: Aluminum alloy Size: Outer Diameter: Approx. 38mm/1.50in Inner Diameter: Approx. 27.2mm/1.07in PackageList: 1 x TrinocularStereoInnerThreadAdapter