Because you may need a complete shower package shipped right away! NEED IT NOW Shower Installation Packages are processed and shipped within 24 hours of your order. We have anticipated a variety of different needs therefore this product line includes many of our most popular showers.  These  along with an accessory package to complete the installation.  Accessory package includes: Delta shower valve w/handheld shower and slide bar, grab bars, a fold-up shower seat w/legs, curtain rod, a heavy vinyl shower curtain, and a WaterStopper water dam.  Multiple sizes and configurations are available to suit any job.  Standard freight is included in the price.