Designed specifically for the Canon 1.4x RF and 2.0x RF extenders, the LensCoat Lens Cover, in basic black, for every occasion and environment provides protection for your valuable gear. It safeguards against scratches and minor impacts, while offering a thermal barrier to keep your hands warm in cold conditions. The cover is easy to install and remove, sliding on like a sleeve and leaving no residue on the lens finish. It has a small hole for the red mounting alignment dot and another for the release button.