Eyecup equivalent to Nikon DK-23, also known as an eyepiece cup. This is a cost-effective and easy-to-use compatible product, not a genuine Nikon part. I have multiple in stock, so I will adjust the quantity if you comment with the number you need. 【Compatible Models】 Fits the following DSLRs, among others. Compatibility details follow those of the Nikon DK-23. D300 D300S D600 D750 D7000 D7100 D7200