3D printed from ASA for heat and UV resistance, these plugs are intended to be glued in the hole for a more finished appearance. If you don't want quite so permanent of a solution (because, hey, everyone wants a visor eventually, right??), we recommend attaching them with a dab of RTV from the back.
For a permanent installation, the glue supplied with the kbox rubber seal kit would be ideal for attaching these while you're putting the trim on.
Sold in pairs - this means you will get 2 if you order 1.