Feature:1. Made of high quality aluminium alloy material, sturdy and durable, better hand feeling.2. Lightweight and compact, easy to carry and store, convenient to use.3. 0.05mm high focusing, with 10mm focusing stroke.4. During the focusing process, the inserted eyepiece, remains unrotated and moves only in linear motion.5. Conducive to observation and photographing, fine workmanship, this micro focusing is extremely precise and even at large multiplier.Specification:Condition: 100% Brand NewItem Type: Helical FocuserModel: YZ-18836Material: Aluminium Alloy Color: As Pictures ShownQuantity: 1PCSWeight: Approx. 128gThread: M42*0.75 Accuracy: 0.05mm Focusing Stroke: Approx. 10mm/0.39inchSize: Approx. 5.8cm/2.28inch Package List:1 x Helical Focuser