Durable, functional eyepiece focuser for astronomical telescopes designed for long-term use. Key benefits Smooth, precise focusing: Steel worm-drive shafts deliver reliable, low-friction motion so you can make fine adjustments and lock in sharp views. Built to last: Rigid plastic construction balances light weight with durability and dependable performance over time. Flexible compatibility: Available in multiple styles to fit a range of telescope setups, giving you options to match your instrument. Correct fit for your tube: Offered in 60 mm, 67 mm, 80 mm and 90 mm sizes — each size has a specific focuser length to suit optical tubes with different internal diameters. What makes this focuser stand out Steel worm-drive mechanism for consistent, repeatable focusing without wobble or slop. Multiple size choices and style options make it easy to select the replacement or upgrade piece that matches your reflecting or refracting telescope. Practical, no-frills construction focused on function and longevity rather than unnecessary complexity. Features at a glance Product type: Eyepiece focuser / drawtube for astronomical telescopes Material: Plastic body with steel worm-drive components Sizes available: 60 mm, 67 mm, 80 mm, 90 mm (each with its own focuser length appropriate for different tube inner diameters) Compatibility: Designed for use with reflecting telescopes and refractor tubes where these sizes and focuser lengths match the internal dimensions Typical applications Replace or upgrade a worn or imprecise focuser on a backyard reflecting telescope to restore smooth manual focusing. Achieve accurate visual focus for planetary and lunar observing sessions where fine adjustments improve image detail. Use as a stable focuser option for eyepiece projection or basic astrophotography setups that require steady, repeatable focus control. Installation and use tips Confirm your telescope’s internal tube diameter or current focuser size before ordering to ensure you select the matching 60, 67, 80 or 90 mm model. After installation, test focusing across your eyepiece range to verify travel and locking performance; the steel worm drive should provide precise control. Select the style option that best matches your telescope type (reflector or refractor) for a simpler fit and alignment. Reliable, practical focuser engineered to deliver smooth focusing and flexible sizing options for a variety of amateur telescope setups.