.mce-ico.mce-i-eps_image_icon {
    background: url("../images/osc-icon-dropdown.png") no-repeat scroll 0 0 rgba(0, 0, 0, 0);
    height: 15px !important;
    position: relative !important;
    top: 1px !important;
    width: 33px !important;
}

.mce-splitbtn.eps_custom_class {
    height: 20px !important;
    line-height: 20px !important;
}

.mce-splitbtn.eps_custom_class:hover{
    border: 1px solid #BBBBBB !important;
    background: linear-gradient(to top, #E5E5E5, #FFFFFF) repeat scroll 0 0 #EEEEEE !important;
}