I've used this in the past, not sure if it will help you or not.
.sixbannerzone {
background-image: none;
border-color: #808080;
border-style: solid;
border-width: 1px;
list-style-image: none;
list-style-style: none;
list-style-type: none !important;
margin: 0px;
padding-bottom: 0px;
padding-left: !important;
padding-right: !important;
padding-top: 0px;
and separately, the below as well,
.fourbannerzone {
background-image: none;
border: 1px solid #000000 !important;
border-style: solid;
border-width: 1px;
list-style-image: none;
list-style-style: none;
list-style-type: none !important;
margin: 0px;
padding-bottom: 0px;
padding-left: !important;
padding-right: !important;
padding-top: 0px;
Hope this helps