Features: This large format lens retaining rings precisely engineered for 3S sized lenses, ensuring a perfect fit to maintain optimal photographic performances and durability in demanding conditions. Constructed from high strength aluminum alloy, it features a lightweight design for easy portability, robust resistance to daily wear and impacts, and user friendly installation for quick camera lens repair. Excellent sealing: ensuring a tight connection between the lens and the camera, effectively prevent dust and moisture from entering, and protect internal components. Superior opt performances: Through precise processing, opt distortion is reduced to ensuring that the imaging quality is not affected and the expression of the work is improved. Strong compatibility: In addition to the 3S lens, the door pressure rings of some models are also compatibles other types of lenses, increasing the flexibility of use. Specifications: Type：Camera Lens Rings Filter Outer Frame Internal thread diameter: 60.4mm Outer rings outer diameter: 69mm For 3S lens and wide compatibility Package Includes: 1Set Lens Rings Filter Outer Frame note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution