These Expanders are a practical and affordable solution for expanding pipes from 2 1/2" to 4". At just $11.87, they are a cost-effective way to increase the size of your pipes without the need for expensive replacements. With a size of 4", these Expanders are perfect for a range of applications. Their simple design makes them easy to install, and they are built to last. If you need to expand your pipes, these Expanders are a reliable and practical choice.