This shower heads combo design has been modified and improved by the experienced engineering team for so many times, from the materials used , installation methods, packaging for transit protection, we have put all the efforts to help you easily upgrade your shower at home , enjoy a great spa at your own bath. All our products are backed by our complete 100% satisfaction guarantee. So if you encounter any issues we are here to help you fix them, the after sales service contact info is included with the installation guide. Enjoy a relaxing and comforting shower experience with your brand new rainfall shower head!