<div class="row padding-top-null">
  <div class="columns-12">
    <div id="service-icons">
      <div class="service-icon-box"><img src="http://www.sourcecertain.com/img/Example.png" alt="just an example"/>
        <p>Lorep ipsum</p>
      </div>
      <div class="service-icon-box"><img src="http://www.sourcecertain.com/img/Example.png" alt="just an example"/>
        <p>Lorep ipsum</p>
      </div>
      <div class="service-icon-box"><img src="http://www.sourcecertain.com/img/Example.png" alt="just an example"/>
        <p>Lorep ipsum</p>
      </div>
      <div class="service-icon-box"><img src="http://www.sourcecertain.com/img/Example.png" alt="just an example"/>
        <p>Lorep ipsum</p>
      </div>
      <div class="service-icon-box"><img src="http://www.sourcecertain.com/img/Example.png" alt="just an example"/>
        <p>Lorep ipsum</p>
      </div>
      <div class="service-icon-box"><img src="http://www.sourcecertain.com/img/Example.png" alt="just an example"/>
        <p>Lorep ipsum</p>
      </div>
    </div>
  </div>
</div>

body {
  width: 100%;
  font-size: 16px;
  min-width: 360px;
  max-width: 1920px;
  margin: auto;
}

.row {
  display: flex;
  justify-content: center;
  padding: 50px 0px;
}

.columns-12 {
  width: 100%;
  padding: 0% 2.5%;
}

#service-icons {
  flex: 1 1 auto;
  display: flex;
  flex-wrap: wrap;
  flex-basis: 100%;
  justify-content: center;
  margin: auto;
}
#service-icons .service-icon-box {
  text-align: center;
  width: 33.33%;
  min-width: 250px;
  padding-bottom: 50px;
}
#service-icons .service-icon-box > img {
  width: 25%;
  max-width: 200px;
  min-width: 150px;
}
#service-icons .service-icon-box > p {
  line-height: 150%;
  padding-top: 10px;
  max-width: 230px;
  margin: auto;
}