ul {
    display: flex;
    justify-content: center;
    list-style: none;
}

ul li a {
    font-size: 14px;
    position: relative;
    margin-right: 30px;
    text-decoration: none;
    color: black;
}

ul li a::before {
    content:"";
    display:inline-block;
    width: 3px;
    height: 40px;
    background-color: black;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: -10px;
}

ul li a::after {
    content:"";
    display:inline-block;
    width: 3px;
    height: 40px;
    background-color: black;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    right: -10px;
}