Nikon Chroma Blue Fluorescent Filter Cube for the Eclipse series of microscopes such as the E400/600/800, TE200/300 Inverted. This filter is new still in original packing with plastic storage case (not pictured). The Nikon number is 96187 and the Chroma number is 31021.

The specifications of the filter are:

Excitation Filter: D390/22X nanometers

Dichroic Mirror: 420CDLP nanometers

Barrier Filter: D460/50m