ironing board cover pink_ironing board under cover

Conclusion

Once the old rollers are detached, measure them carefully to ensure you purchase the correct replacements. Note the width, height, and any unique features, such as ball bearings. With the new rollers in hand, slide them into the assembly's housing, making sure they fit snugly.

In other words, aluminum profiles with relatively thick surface material often look better and sturdier than the reverse.