Caliber and fit The caliber refers to both the internal size of the cover and the outer diameter of the bearing. Before , measure the bearing diameter to ensure compatibility. Product details The cover is sold as a single sheet. Material: cover is made of plastic, bottom part is made of rubber. Folding opening design protects your lens from scratches and dust while allowing easy access. Why this matters Accurate fit helps prevent lens exposure to dust and scratches. Durable plastic and rubber construction provide reliable protection during handling and storage. Folding opening design combines protection with convenient access for quick lens use. Compatibility and sizing tips To ensure proper fit, measure the bearing diameter and compare with the cover's caliber specification. Confirm the cover's internal size matches the bearing outer diameter for a secure fit. Use scenarios In studio setups: protect the lens between shots and changes, reducing the risk of scratches. Outdoor shoots: shield the lens from dust, sand, and windblown debris during transport and setup. Travel or storage: keep the lens protected inside a bag or case, minimizing exposure to incidental impacts and dust. Note Please verify bearing diameter before to ensure proper compatibility with your equipment.