【Premium Construction】- Precision meets quality in our telescope manual focus . The is designed with ABS plastic material, lending it stability and durability. Even under large magnification, its performance remains smooth and seamless. 【Innovative Design】- With internal matting, our telescope refractive focus holder showcases an innovative approach with its fully threaded interior. This design reduces reflections, enhancing viewing quality and precision. 【Micro Focusing Feature】- Aiming for precision? Our reflective telescope focusing is designed with a lens tube size of 90mm. The length is adaptable through the gear, with a focus length of 120mm, and it is suitable for 1.25-inch eyepiece interfaces. 【Ease of Installation】- Ease and practicality come together with our astronomical telescope focuser. It offers a smooth focusing experience for reflection telescopes, making it a suitable choice for DIY homemade refractive astronomy telescopes. 【Secure Fixing Screws】- Our 90mm focusing mount provides a stable viewing experience, thanks to the fixing screws designed on the sides. These secure the eyepiece inside, providing stability for precise and uninterrupted observation.