This is a spare or replacement Lens Cap for Nikon Lenses with a 72mm filter thread.
Nikon 72mm NC Neutral Colour Filter
Composite Decking Fixed Pedestal - 43mm - 72mm
Hoya 72mm UX II PL-CIR Filter
Urth 72mm Dual Kit - CPL/UV
Fujifilm 72mm Front Lens Cap
Urth 86-72mm Adapter Ring for 100mm Square Filter Holder
