* K&F CONCEPT is the world's No. Magnetic & Thread 2-in-1]The lens filter cap can screw on the lens, and also can absorb on filter via magnetic. [Aviation Aluminum Alloy]Made of aviation aluminum alloy, hard and anti-impact enough 2-in-1 Magnetic Metal Lens Cap with Thread. Magnetic Lens Filter 62Mm Cpl Nd8 Nd64 Magnetic | K&F Concept - K&F Concept Caps For Magnetic Filter System UV CPL Filter Kit K&F Concept 62mm UV & CPL - Ultra-Violet & Circular Polarizing Filters For Photography Lens Filter Set 62mm Uv Filter Choose right size: For example 82mm filters/ lenses can only be attached to 82mm magnetic lens caps. K&F Concept Thread & Magnetic 2-in-1 Lens Filter Cap Only for K&F Magnetic Swap ... Approx. C $27.77. US $19.99 Made of aircraft-grade aluminium alloy for high strength and impact resistance. Scratch resistant for lenses and filters.