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 aluminum alloy, it has good durability and stability, is not easy to deform or wear, and has a long service life. 4. Ideal Replacement: Professional and practical design with a sleek appearance, easy to carry and use, a great replacement for a broken adapter. 5. Application: The trinocular stereo inner thread adapter is widely applicable for laboratories, schools, teachers, sample observation, and eyepiece protection. Specification: Item Type: Trinocular Stereo Inner Thread Adapter Material: Aluminum alloy Outer Diameter: Approx. 38mm / 1.50in Inner Diameter: Approx. 27.2mm / 1.07in Package List: 1 x Trinocular Stereo Inner Thread Adapter