Quoted from Joker2Wild:I have them on carpet so initially bought magic sliders for them:
http://www.lowes.com/pd_36869-46422-4703495L___?productId=50383642&pl=1&Ntt=magic+sliders
They work great for pulling the machines out and sliding them back in but seem to add a far amount of bounce to the machine due to the foam part of the magic sliders that they sit on.
Not all brands have that cushy foam. The ones I use look like this ...