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nicescroll
5 plugin
WS Custom ScrollbarWS Custom Scrollbar plugin will enable change scrollbar styles where you can change scrollbar color, border radius, scroll speed, width.
NicescrollrA wrapper plugin for the Nicescroll library with full customization options for both frontend and backend.
As Nice ScrollAs nice scroll is a jquery plugin for WordPress site. This plugin will create a nice scrollbar for your site.
Wp Custom scrollbarWp Custom scrollbar is nicescroll wordpress plugin.
R NicescrollR Nicescroll plugin is Simple wordpress plugin for Custom Scrollbar.