NISI JetMag Pro Lens Hood Kit for Ricoh GR IVDedicated Design for Ricoh GR IV Precision engineered exclusively for the Ricoh GR IV, replacing the standard GN 3 ring with a purpose built 49mm filter adaptor, magnetic square lens hood, and magnetic lens cap for a seamless, integrated fit. Not compatible with GR III models. Magnetic Snap On Design Attach and remove the lens hood and lens cap instantly with a powerful magnetic system. No tools are required; simply snap them on and off for fast,