To emphasize the division between default bootstrap columns, you may want to add borders to clean separate content; Added benefits is the ability to create hover properties.
For detailed instruction's, view Solodev's How to Create Bordered Services Boxes with Bootstrap article.
Try out a working example on JSFiddle.
The tutorial contains the following basic HTML markup.
<div class="services-wrapper">
<div class="container svcs-container">
<div class="row">
<div class="col-sm-4 services-box hoverServices">
<div class="service-icon">
<img alt="Valkyrie-1 Series" src="images/valkyrie.png">
</div>
<div class="info text-center">
<h3 class="services-subheading">
Valkyrie-1 Series
</h3>
</div>
<div class="info col-lg-10 col-lg-offset-1">
<ul>
<li>Reusable heavy launch vehicle
</li>
<li>Capable of vertical takeoff
</li>
<li>Landing on the Moon
</li>
</ul>
</div>
</div>
<div class="col-sm-4 services-box hoverServices">
<div class="service-icon">
<img alt="Talon-2 Series" src="images/talon.png">
</div>
<div class="info text-center">
<h3 class="services-subheading">
Talon-2 Series
</h3>
</div>
<div class="info col-lg-10 col-lg-offset-1">
<ul>
<li>High altitude travel across the planet
</li>
<li>Crosses great distances in short periods of time
</li>
<li>Supply colonies with the necessary resources
</li>
</ul>
</div>
</div>
<div class="col-sm-4 services-box hoverServices last">
<div class="service-icon">
<img alt="Lunar XPlorer" src="images/lunar-xplorer.png" style="width: 180px; height: 176px;">
</div>
<div class="info text-center">
<h3 class="services-subheading">
Lunar XPlorer
</h3>
</div>
<div class="info col-lg-10 col-lg-offset-1">
<ul>
<li>Long-term space travel
</li>
<li>Information Flow Architecture
</li>
<li>Landing Page Development
</li>
</ul>
</div>
</div>
</div>
<!--row-->
</div><!-- svcs-container -->
</div><!-- services-wrapper -->
</div>
</div>
This tutorial includes the following third party resources.
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>