Edit in JSFiddle

<div class="group" data-i2="height:['10px','60px']"> 
    <div data-i2="rate:3"></div>
    <div data-i2="rate:2"></div>
    <div data-i2="rate:1"></div>
</div>
<div class="group" data-i2="height:[10,60]"> 
    <div data-i2="rate:3"></div>
    <div data-i2="rate:2"></div>
    <div data-i2="rate:1"></div>
</div>
.group>div
{
    width:20px;
    display: inline-block;
    border: 1px solid gray;
}
i2.emph();