A UI kit is useful for a designer and has a wide range of advantage such as radio buttons, search bars, message alerts, tabs, buttons, check boxes, etc. These UI kits can help the task easier for a website designer.
I know you can find a lot of UI kits out there but I would like to present this one: Bjarne Øverli is a web developer from Norway who created this UI kit. It is a light and clean UI kit design. I encourage you to download them to use for your project.