This is a Nikon sync terminal cap. This is a set of a sync terminal cap and a 10-pin terminal cap that can be used with Nikon SLR cameras. How about for protecting exposed contacts or for dealing with deterioration of the rubber? <Compatible Products> D3, D2XS, D2X, D2HS, D2H, D1X, D1H, D1, D300, D200, F6, F5, F100, F90X, F90, etc. Please understand that this is a used item from a private seller, and those who are concerned about slight dirt or scratches should refrain from purchasing. No claims and no returns are accepted.