Bootstrap 4 UI Kit Created Using Adobe InDesign CC 2017
As well as Bootstrap components, there is also a 1200px grid system, with twelve 80px columns, eleven 20px gutters, 10px margin at both horizontal sides.
The grid system abides by a formula: 80px*12+20px*11+10px*2=1200px, which widely accepted by web designers and front end engineers.
Preview:
