.arrow_box:after, .arrow_box:before {
    left: 100%;
    top: 50%;
    border: solid transparent;
    content: " ";
    height: 0;
    width: 0;
    position: absolute;
    pointer-events: none;
   -ms-transform: rotate(180deg); /* IE 9 */
   -webkit-transform: rotate(180deg); /* Chrome, Safari, Opera */
   transform: rotate(180deg);
}