Product review (5 stars): Keeps washer/dryer stack from moving around.
Bought these to use as a base to my new HE Maytag washer, which sits underneath my new LE dryer. Read numerous reviews of people having issues with their washers "walking" around, and after witnessing the spin cycles I didn't want these heavy units taking a trip into my walls.

Built a custom wood stacking platform to sandwich between them, purchasing a different set of rubber feet for the base of the dryer, then sinched the whole thing together with a heavy duty ratchet strap. These feet work awesome! Even during the startup to the ludicrous speed spin cycle, the units wobble ever so much, but the stack has stayed stuck to where it was since day one.

Glad for all the good reviews on this, these rubber feet fit my washer perfectly, and do the job as intended.