This is our NEW reproduction Federal Beacon Ray base gasket in WHITE I also have BLACK available on my other sales. This is for the Federal Beacon Ray 17, 173, 174, 175 and 176 but it would work on any light with a .040 thick skirt similar to the Beacon Rays. We have had these produced by a leading rubber manufacturer in Northern Ohio they are a ISO9001 approved manufacturer. We have researched any improvements on the original gasket and with todays hi-tech rubber extrusion methods incorporated them into our product made of long life EPDM rubber. The fit is actually better than original. This is enough for the base of one light I also have it in bulk length on my other sales in BLACK and WHITE. And I have the dome gaskets as well.  Any questions send a message. Thanks Gary