ul {
list-style-type: none;
display: flex;
flex-direction: row;
}
li {
padding: 10px;
}
.custom-border {
position: relative;
}
.custom-border:after {
content: " ";
position: absolute;
border-left: 1px #6c757d solid;
top: 35%;
right: 0;
height: 30%;
margin-top: auto;
margin-bottom: auto;
}