.owl-prev {
  width: 20px;
  height: 100px;
  position: absolute;
  top: 40%;
  left: -20px;
  display: block !important;
  border:0px solid black; 
}

.owl-next {
  width: 20px;
  height: 100px;
  position: absolute;
  top: 40%;
  right: -20px;
  display: block !important;
  border:0px solid black;
}
.owl-prev i, .owl-next i {color: black;}