Using a wall mounting bracket for a mini-split AC unit is essential to ensure the safety, stability, and efficiency of the system. It is a recommended and necessary component of the installation process, providing numerous benefits that contribute to a successful and well-functioning ductless mini-split system. Specification: Compatibility: Mini-split AC bracket is designed to be compatible with a wide range of mini-split units from different manufacturers. Please check the size of your mini split units before buying. Ease of Installation: The wall mounting bracket come with necessary parts for installing. Exclusive built-in bubble level to correct mounting slope position for set up. Design with cross bar enhance the structure for long term stability. Features: -36" cross bar -18.1" long vertical rail -21.6" long support bracket -The support holds up to 440 pounds -Support A/C BTU ratings of: 9000 BTU - 36000 BTU