[flexcoders] custom HSlider display?

[markflex2007]

Hi

I want to use slider to select distance.I need select 500,ik,2k,3k,4k,5k etc 
with slider.

I use the follow component to do that. but 1.5k,2.5k etc also display

<mx:HSlider id="hsInput" x="139" y="73" width="300" minimum="500"   
maximum="5000"  tickColor="0x323232"
                     snapInterval="500" tickInterval="500" 
labels="['500m','5km']" liveDragging="true"  />

How to make the slider doesn't display 1.5k,2.5k etc.so people can not 
select the values (like 1.5k,2.5k etc)

Thanks for help

Mark