This eyepiece eye cup is a genuine Canon product, compatible with the EOS R5 R6 R6II models. It is designed to fit perfectly and provide a comfortable viewing experience for extended periods of time. Made in Japan, this unit is of the highest quality and is sure to meet your expectations. It is perfect for those looking to replace their old or damaged eyepiece, without having to worry about compatibility issues. This eyepiece eye cup is a crucial component for any digital SLR camera, and this Canon product is the perfect choice for those who want the best.