This part is located on the drum roller support shaft in your dryer appliance. The exterior of the washer is 1 inch in diameter with a hole in the middle and is made of metal. They are installed alongside the drum support rollers and idler pulleys. If you notice that your dryer is making an unusual sound it could be due to the washer beco...Read moreming loose on the drum support. They help prevent the rollers and pulleys from bumping up against the brackets they are installed on. If you are replacing the rollers, we suggest you replace the washers at the same time.