This is a set of one Micro Four Thirds lens rear cap and one body cap. These are compatible products. When a lens is attached to a camera body, the caps must be stored separately. And they are easily forgotten and lost. Genuine caps are expensive, and it's a shock when you lose them. If you use these reasonably priced caps from the start, the shock will be less if you happen to lose them. It's recommended to use these from the beginning instead of using genuine products regularly. Also, caps may not be included when you buy used lenses or used camera bodies. These can be used in such cases. LUMIX OLYMPUS MFT Panasonic Rear lens cap Rear cap