Welcome to the store! 1. Function: 38mm to 27.2mm inner threaded adapter, suitable for trinocular stereo microscope lens transfer, to meet work needs. 2. Parameter: Outer diameter is 38mm, 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, a good replacement for the broken one. 5. Application: The trinocular stereo inner thread adapter is widely applicable for laboratories, schools, teachers, specimen observation, eyepiece protection, etc. Item Type: Trinocular Stereo Inner Threaded Adapter Material: Aluminum Alloy Size: Outer Diameter: Approx. 38 mm/1.50 inches Inner Diameter: Approx. 27.2 mm/1.07 inches 1 x Trinocular Stereo Inner Threaded Adapter Your 100% satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!