The contents of our installation kits have been established over many years of development in conjunction with our extensive installation experience. They represent the easiest way to purchase your installation requirements and provide better value than purchasing components individually. Obviously, due to the various types of construction and design of homes, we cannot guarantee sufficient components absolutely every time, however it is rare that a customer requires additional components. See the installation parts section for pictures of these parts, and refer to the installation manual for details on how each part should be used.