div.SpaceBetween

{

    background-color:  transparent;

    width: 100%;

    height:  auto;

    display: flex;

    flex-direction: row;

    flex-wrap: nowrap;

    justify-content: space-between;

    align-items: center;

}



div.SpaceBetweenContent

{

     width:  150px;

     height: 150px;

     background-color: #000000;

}

<div class="SpaceBetween">

 

  <div class="SpaceBetweenContent"></div>

  

  <div class="SpaceBetweenContent"></div>

  

  <div class="SpaceBetweenContent"></div>

  

  <div class="SpaceBetweenContent"></div>

  

</div>