Hi, We are selling the window bars we had in our mid-rise condo. You need this if you have a kid and live in a 2+-story / tall building.
The Guardian Angel® Window Guard is a set of removable steel bars designed to prevent children from falling out of windows.
This is model 5890-45, for double-hung windows 58-90" wide with a maximum window opening of 26".
http://www.guardianangelwindowguards.com/#guardian-angel-window-guards
https://gaguards.com/products/adjustable-window-guards-58-90-model-5890
Comes with screws, but you can use your own too.
$15 each. We bought each new for $140. We have two of them.
home apartment condominium condo house high-rise rise high mid security