Caliber compatibility and fit The caliber size is the same as both the internal opening of the cover and the outer diameter of the bearing. Before , measure the bearing diameter to ensure a proper fit. Product configuration The cover is sold as a single sheet. Materials cover is made of plastic. Bottom part is made of rubber. Design and protection Folding opening design for easy access to the lens when needed. When closed, the cover helps protect the lens from scratches and dust. Key benefits Provides reliable protection for lens surfaces during storage, transport, and handling. Durable plastic and rubber construction offers a lightweight yet protective solution. Simple, singlesheet design facilitates quick use without complex setup. Use scenarios Outdoor photography and travel: safeguard the lens during transit in bags or cases. Dusty field environments: shield the lens when not actively shooting to minimize contamination. Workshop or studio maintenance: convenient cover during cleaning, adjustments, or assembly of optical equipment. How to verify fit Measure the bearing diameter and compare to the cover's internal opening to confirm compatibility. Ensure the cover diameter matches the bearing outer diameter for secure seating and protection.