This is the classic 105mm f2.5 AI-s, one of the best lenses that Nikon ever made. It is a lens that every classic Nikon users needs in the bag. This is the latest and best version and has a built in lens hood and improved coating.
This lens is in excellent condition and works perfectly. The focus is very smooth and the aperture is dry and snappy. There is a small scuff on the rear element, but is on the edge, it won't affect your image quality. Otherwise the glass is clean and scratch-free.