Universal Design: Adapts to most window units (check description below for window requirements). Indoor Installation: Air Conditioner Bracket Easy breezy assembly, without exterior work. Relieve Stress on Window: Transfers the stress and weight from the window sill and sash to the support and window frame for safety. (Need to drill installing holes to window) Fits wall from 2" to 15.2" thick, exclusive built-in bubble level to correct mounting angle. Heavy Duty: Made of Solid galvanized, epoxy-coated steel, preventing the A/C to drop out of the window; Expansion screws are usually suitable for cement, brick and wood sills. (Not fits for hollow aluminum sills). Foozet AC Window Air Conditioner Bracket Heavy Duty Support Up to 165 lbs, Designed for Universal A/C Unit Up to 24 ,000 BTU

Makes air conditioner installation easier, quicker, and safer
Minimizes the chance of damage to the window, window parts or outside wall

Window Requirements:
Window sill thickness cannot exceed 16 inches
Window sill must be a minimum of 1 1/4 inches deep for placing base
Window sill must be able to accept 2 1/2 inches long screws
Sliding window lip or window stool cannot exceed 1 7/8 inches
Cannot be used with slide casement or casement windows

Installation
Step1. Find the gravity center of your window unit (right/left/balanced), it decides the installation point of the AC unit
Step 2. Measure and mark the center of window sill
Step 3. Drill holes to anchor the concave block, add the spacers and mount the support shelf
Step 4. Place end of leg under the shelf. Slide the leg shelf foot pad against exterior sidewall.
Step 5. Adjust the angle. Slightly tilt for draining condensation of moisture. Then lock the leg and support shelf.
(For more details, please see the instruction attached)

Specification
Size:Up to 165lbs
Shelf : 17" long A/C resting surface
Support A/C BTU ratings of: 7,000 BTU-24,000 BTU
Fits wall thickness from 2" to 15.2"