Focusing screen for Pentax DSLR cameras. I don't know all models that it fits but it does fit Pentax K-5 series and the K-50 series as that is what I have and use these screens with. Item is in working condition with small scratch in bottom corner when viewing through viewfinder. It doesn't affect the images at all and is not something that I found to affect my experience in any way. I just wanted to mention it so there would be no surprises.