How to add vertical scrolling to md-tab-group tag in Material

I am really interesting if i could make a horizontal scrollbar for md-tab-group. I mean not just like an arrow, but add a horizontal scrollbar? Which will be scrolling over components?

<md-tab-group>
    <md-tab label="Item1"></md-tab>
    <md-tab label="Item2"></md-tab>
    <md-tab label="Item3"></md-tab>
    <md-tab label="Item4"></md-tab>
    <md-tab label="Item5"></md-tab>
</md-tab-group>

Here is a simple example and i wonder how could i implement a scrollbar here?