Install your window air conditioner without drilling or wall damage. This adjustable, heavy-duty steel bracket assembles from inside the room and provides a stable, level base for most 5,000–24,000 BTU units. The reinforced frame supports up to 220 lb, while the powder-coated finish resists corrosion for long service life. A wide 31.5"–41.7" adjustment range fits both single-hung and double-hung windows, and the triangular support design improves load distribution for a safer fit. Non-slip pads and anti-shake fasteners protect your window sill and reduce vibration, helping your A/C run more quietly. All required hardware is included, so you can complete installation quickly and confidently—no exterior work or drilling required.