By reducing the amount of non-essential light falling onto the front lens element, lenses can better achieve their optimum optical performance, producing more saturated images.
A more modern look to your photo gear.
Lens Hood can be reversed.

Compatible models:
NIKON HB-29 or JJC LH-29 Flower bayonet lens hood
NIKON AF Zoom-Nikkor 80-200mm f/2.8D ED
(or other version of NIKON 80-200mm lens compatible with NIKON HB-7 lens hood.)