PLAY X STORE&reg;DK-24 Rubber Eyecup for Nikon D3100 D5000 D3000 D5100 SLR Cameras Made of rubber for soft eye contact. You can even view it with your glasses on The Eyecup provides cushioning around the camera's eyepiece, and is especially useful to eyeglass wearers Material: Rubber Attaches to the viewfinder eyepiece minimizing extraneous light and vision fatigue 100% Brand New, High Quality