Eye cup equivalent to Nikon DK-21, also known as an eyepiece. This is a compatible product, not a genuine one, offering great value and ease of use. I have multiple in stock, so please comment with the quantity you need, and I will adjust the listing. 【Compatible Models】 Suitable for the following single-lens reflex cameras, among others. Compatibility details follow those of the Nikon DK-21. D80 D90 D200 D300s D600 D610 D750 D7000