The iFog Vortex Coil Caps are replacement coil caps made for the iFog Vortex unit, so there's no guesswork about which device they're meant for. If your Vortex has lost a cap or one has seen better days, this is the quick fix.
They're made of stainless steel, a sturdy, dependable material for a small part that gets handled often. The plural in the name means you're getting caps in the listing rather than a single piece, though the page doesn't give an exact count, so take a look at the photos to see what's included. There are three of them on the page, so you can see the caps from a few angles and compare them with the one you're using.
Small parts like this are easy to misplace, which makes them a smart thing to keep a spare of. Before you order, confirm that your device is the iFog Vortex, and the rest takes care of itself. They also slip easily into any order as a practical add-on.