JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box box">box<br/>Item</div><div class="box box">box<br/>Item</div><div class="box box">box<br/>Item</div><div class="box box">box<br/>Item</div><div class="box box">box<br/>Item</div>
<div class="box box">box<br/>Item</div><div class="box box">box<br/>Item</div><div class="box box">box<br/>Item</div>

CSS

.box {
   display:inline-block;
   margin:0;
   height:30px;
   padding:0 15px;
   text-align:center;
   position:relative;
 }
 
.box:before {
	position:absolute;
	content:'';
  height:80%;
  right:-1px;
  width:2px;
  top:0;
  bottom:0;
  margin:auto;
  background:red;
 }
 
.box:last-child:before {
   display:none;
 }