Every vape has a few small parts that decide whether things run smoothly, and a coil cap is one of them. If yours has gone missing or you simply want a spare on hand, this replacement is made for the Yocan Evolve Plus.
It's a metal coil cap from Yocan, the same brand behind the device itself. That's a handy detail, because when you're replacing a part, it's reassuring to buy one that's designed for your model rather than a general-purpose substitute.
There isn't much to overthink here. It's a straightforward, no-frills replacement. Just make sure you have an Evolve Plus before you order, since the page lists it specifically for that device and doesn't mention others.
And since it's such a small part, it's a practical thing to add to an order so you're covered next time you need it.