Top window protection for cats

The tilt knob should be relatively high mounted to allow the cats to control
can not simply move up.

I have several orders, so that I can ventilate properly.

Furthermore, the regulator also protects against sudden slamming of the window at
Swipe.

The only drawback is the price on the internet.
I have a few days later the same tilt controller in bed stock
for 2.99 discovered!