How to remove gaps between each tab title bloger

When you add background image to tabs menu blogger it can happen to show up gaps between each tab,We can put this code if want to disappear

This is the code

border-left:0px;
border-right:0px;

looks like this

.tabs-inner .widget li a {
background-image:("url image");
border-left:0px; border-right:0px;