4 sets Versatile Outdoor Wall Mounting Bracket for Ductless Mini Split Heat Pump Systems Adjustable to fit 9,000 BTU – 36,000 BTU units with maximum weight of 550 lbs Vibration control and shock absorbers are built-in backstops are adjustable Foldable design with all necessary hardware included 21 6 x 17 7 x 33 4 in