I am offering four window guards for $32 total.
All four guards measure 15" high.
The height is not adjustable.
The width is adjustable.
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The first two are the same model. (See first and second photos.)
They are aluminum.
The horizontal (sideways) bars are round in cross-section.
The guards are 20 1/2" wide at their narrowest, and 37" at their widest.
There is some extra paint on them.
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The third one is aluminum. (See third photo.)
The horizontal bars are square in cross-section.
It is 21" wide at it's narrowest, and 37" at it's widest.
A little of the dark paint has come off.
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The fourth one is steel. (See last photo.)
The horizontal bars are round in cross-section.
It is 22 1/2" wide at it's narrowest, and 41 1/2" at it's widest.
A little of the dark paint has come off, and there is a little rust.
This is the heaviest and strongest guard.
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All have been sprayed, scrubbed, and rinsed clean.
All do not have dents.
All have two screw holes on each side (four screw holes total).
NOTE: Window guards are usually attached underneath the top window, so the top window will hit the guard when you open the top window a lot.
To check that these guards are good for your windows, open the top window until there is 15" from the top-window-bottom and window sill.
Then see how much the top window has opened.
Make sure a child can not fit through the opening.