The CNC Rock Guard is designed to help protect our condensers from rocks and debris. This option is available for all of our condensers and come installed on the condenser when purchased at the time the condenser and main unit are ordered new. If you previously purchased a condenser from us it will fit but we will need a  email from you with the size of your condenser (single fan or dual fan). The unit features aluminum with TIG welded expanded aluminum inserts and is powder coated flat black.