.wrapper {
  display: -ms-flexbox;
  display: flex;
  -ms-flex-direction: column;
  flex-direction: column;
}

.block {
  display: -ms-flexbox;
  display: flex;
  -ms-flex-direction: column;
  flex-direction: column;
  -ms-flex-pack: center;
  justify-content: center;
  min-height: 40px;
}

<div class="wrapper">
  <div class="block">
    <div class="item"></div>
  </div>
</div>