Feature: 1. Micro Focusing: The size of the lens tube is 90mm, the focal length can be adjusted through the gear, the focus length is 120mm, and it is suitable for 1.25 inch eyepiece interface. 2. Fine Workmanship: With high precision design, even under large magnification is still smooth, ABS plastic material, longer service life, more durable. 3. Fixing Screws: Designed with fixing screws on the sides to secure the eyepiece inside and keep the eyepiece stable for observation. 4. Internal Matting: This telescope focusing mount features a fully threaded interior design to minimize reflections. 5. Easy to Install and Operate: Easy to use, smooth focusing for reflection telescopes, suitable for DIY homemade refractive astronomy telescopes. Specification: Item Type: Telescope Focusing SeatMaterial: ABS, plastic Applicable Eyepiece Connector: 1.25 inches Focusing Way: Helical teeth with manual focusing . Package List: 1 x Telescope Focusing Seat