Product review (1 stars): This is a must for the Haier HLP23E (revisited on 6/23/13)
I'm still not sure why the wheels on their LEAST expensive washer are standard, and the next to least you need to pay for, but these wheels are just what is needed. My wash room is in the kitchen, and my storage is in the bedroom (welcome to the joys of apartment living). The Wheels make it easier to transport back & forth. You can lock the wheels, but I haven't found a need to yet. This was a great investment, and I found that they throw in a 5th one in case something happens.
Update: Well it happened with a vengeance. The wheels (including the the piece that clips into a pin bar) is made out of plastic. I thought there would be some form of ball barring support or something, considering how heavy the machine is, and how expensive the wheels are. They are nothing but cheap plastic. I do have a better solution though. Go to any hardware store, or order them here. Get super Sliders 1 11/16", and put them on the original posts that came with the machine. It won't work as well as wheels do, but I bet they last longer. These wheels are nothing but cheap sh++!!! Don't make the mistake I did.