The Urth 40.5 mm magnetic lens filter caps provide reliable protection for magnetic camera filters in a compact design. Made from hardened magnalium, an alloy of magnesium and aluminum, these caps ensure lasting protection against dust, scratches, and impacts. The magnetic attachment system guarantees a secure hold without additional mounting elements and allows for quick attachment and removal. With a diameter of 40.5 mm, these filter caps are compatible with Urth magnetic filter systems and similar magnetic filter mounts. The minimalist design reduces bulk in the camera bag while providing full protection. The magnalium construction offers corrosion resistance and maintains magnetic properties over extended use. These lens filter caps are designed for photographers seeking organized, space-saving protection for their filter collection during transport and storage. The magnetic connection prevents accidental detachment while allowing easy access when needed. The hardened material withstands deformation from typical handling pressures in photographic workflows. These caps support the longevity of magnetic lens filters by avoiding surface contact and accumulation of particles between uses. The standardized 40.5 mm size fits most magnetic filter systems with this diameter. The neutral color ensures visual compatibility with various camera accessories without distracting from the photographic composition. These protective caps are suitable for professional photographers and enthusiasts who use multiple magnetic filters for different shooting conditions.