UNIVERSAL DESIGN - adapts to most window units (check description below for window requirements)
INDOOR INSTALLATION - easy breezy install, without exterior work, just drilling into window sill
RELIEVES STRESS ON THE WINDOW - Transfers the stress and weight from the window sill and sash to the support and window frame for safety
FITS WALL THICKNESS from 2" to 15.2", exclusive built-in bubble level to correct mounting slope position
ALL NECESSARY HARDWARE INCLUDED and all weather construction. Note: If you found feet pad of the leg cannot justly face the wall; please unlock it and turn it over, then fix it in the leg again. Patent No. US D989611