Feature: 1. Fine Tuning: The gear can be fine tuning. The telescope has an 80mm aperture. You can adjust the focal length by the gear. It has a focusing length of 120mm and is compatible with 1.25 inch eyepieces. And fine tuning more accuracy, even at high magnification, ensuring smooth and stable observations. 2. Secure Locking Screw: The side is equipped with a locking screw that securely holds the eyepiece in place, ensuring stable and steady observation. 3. Internal Anti Reflection Design: The interior of the focusing seat is designed with full threads to minimize reflections and maximize image quality. 4. Easy Installation and Operation: Convenient to use, suitable for smooth focusing on reflector telescopes. 5. Versatile: Suitable for DIY refractor telescopes. Made of durable ABS plastic material, ensuring a longer lifespan. Specification: Item Type: 80mm Focusing Seat Material: ABS, Plastic Weight: Approx. 201g / 7.1oz Eyepiece Interface Size: 3.2cm / 1.25in Focusing Method: Incline Teeth With Manual Focusing. Package List: 1 x 80mm Focusing Seat