JJC L-R9 Body Cap and Rear Lens Cap are specially designed for SONY E Mount digital cameras and E mount lenses. When storing the camera without a lens attached, the Body Cap can effectively protect the image sensor and internal camera components from dust, moisture, and other elements. Besides, the Rear Lens Cap also can effectively protect your valuable lenses against scratches, moisture, dust and fingerprints when it is not attached to the camera. JJC L-R9 Body Cap replaces Sony ALC-B1EM Body Cap. JJC L-R9 Rear Lens Cap replaces Sony ALC-R1EM Rear Lens Cap.