This lens bayonet mount ring is wear-resistant and rust-proof, designed for durability. It is a professional repair replacement part for your damaged lens mount ring. Constructed from plastic material. Diameter: 5.8cm (Approx.) Inner Diameter: 4.1cm (Approx.) Outer Diameter: 5.9cm (Approx.) Compatible with Nikon 18-55, 18-105, 18-135, and 55-200 lenses. Features: Professional design, rust-resistant, suitable for repair. Item Name: Lens Bayonet Ring Material: Plastic Compatible Models: Nikon 18-55, 18-105, 18-135, 55-200 Size Details: Diameter: 5.8cm / 2.28" (Approx.) Inner Diameter: 4.1cm / 1.61" (Approx.) Outer Diameter: 5.9cm / 2.32" (Approx.) Note: Due to lighting and screen settings, the actual color may vary slightly from the images. Slight dimensional variations may occur due to manual measurement. Package Includes: Style A: 1 x Lens Bayonet Ring or Style B: 1 x Lens Bayonet Ring 1 x Screwdriver