Adjustable Window Ventilator From 21 to 37 Inches
Bring refreshing air into a room while keeping wetness out. Adjustable Window Screen has built-in louvers to block out rain, dust, and insects, while allowing fresh air to circulate. 10" high window ventilator easily slides in place to fit all double hung windows with or without set-in screens. Adjusts from 21" to 37". No tools needed.