Feature:1. Full-metal 7-21 zoom eyepiece,high clear, high-magnification, suitable for stargazing.2. Multi-layer optical coating, providing a clear and bright view.3. Rotating adjustment ring, adjustable from 7MM-21MM, meeting different observation needs.4. Foldable eyecup long eye relief design, catering to different users.5. 1.25-inch interface, strong universality, 8.5cm in length, easy to carry.Specification:This full-metal 7-21 zoom eyepiece is a ,high clear, high-magnification astronomical telescope accessory, suitable for stargazing enthusiasts. It features multi-layer optical coating, providing a clear and bright view. The rotating adjustment ring can be adjusted from 7MM-21MM to meet different observation needs. With a 1.25-inch interface, it has strong universality.Features:Full-metal 7-21 zoom eyepiece,high clear, high-magnification, suitable for stargazing.Multi-layer optical coating, providing a clear and bright view.Rotating adjustment ring, adjustable from 7MM-21MM, meeting different observation needs.Foldable eyecup long eye relief design, catering to different users.1.25-inch interface, strong universality, 8.5cm in length, easy to carry.Specifications: Material: Full-metal Color: Black Interface: 1.25 inch Length: 8.5cm / 3.35in Weight: 135g / 4.76ozPackage list: 1 x Full-metal 7-21 Zoom EyepiecePackage List:1 x Full-metal 7-21 Zoom Eyepiece